Engine Control Module (ECM), Diagnostic Trouble Code (DTC), Guide 2010 Emissions MRU, LEU

Service Manual

Trucks

Group 28

Engine Control Module (ECM), Diagnostic Trouble Code

(DTC), Guide

2010 Emissions

MRU, LEU

PV776-88969578

Foreword

The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to April 2010.

The products are under continuous development. Vehicles and components produced after the above date may therefore have different specifications and repair methods. When this is believed to have a significant bearing on this manual, supplementary service bulletins will be issued to cover the changes.

The new edition of this manual will update the changes.

In service procedures where the title incorporates an operation number, this is a reference to a Labor Code (Standard Time).

Service procedures which do not include an operation number in the title are for general information and no reference is made to a Labor Code (Standard Time).

Each section of this manual contains specific safety information and warnings which must be reviewed before performing any procedure. If a printed copy of a procedure is made, be sure to also make a printed copy of the safety information and warnings that relate to that procedure. The following levels of observations, cautions and warnings are used in this Service Documentation:

Note: Indicates a procedure, practice, or condition that must be followed in order to have the vehicle or component function in the manner intended.

Caution: Indicates an unsafe practice where damage to the product could occur.

Warning: Indicates an unsafe practice where personal injury or severe damage to the product could occur.

Danger: Indicates an unsafe practice where serious personal injury or death could occur.

Mack Trucks, Inc.

Greensboro, NC USA

Order number: PV776-88969578

Repl:

All rights reserved. No part of this publication may be reproduced, stored in retrieval system, or transmitted in any forms by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of Mack Trucks, Inc.

USA41614

Contents
Troubleshooting ..........................................................................................................................	3
Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) .....................................................	3

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

Troubleshooting

Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs)

The manufacturer scan tool is the preferred tool for performing diagnostic work. Contact your local dealer for more information or visit “www.premiumtechtool.com”.

Note: The use of a scan tool is necessary to perform diagnostic work as well as clearing of any diagnostic trouble codes (DTCs). DTC(s) can no longer be cleared using the vehicles instrument cluster digital display and stalk switch control.

System Overview

Six electronic control units (ECUs) are used; the engine control module (ECM), instrument control module (ICM), Vehicle Electronic Control Unit (VECU), transmission control module (TCM), the gear selector control module (GSCM) and the aftertreatment control module (ACM). Together, these modules operate and communicate through the SAE J1939 data links to control a variety of engine and vehicle cab functions. The ECM controls such things as fuel timing and delivery, fan operation, engine protection functions, engine brake operation, the exhaust gas recirculation (EGR) valve and the turbocharger nozzle. The VECU controls cruise control functions, accessory relay controls and idle shutdown functions. The ICM primarily displays operational parameters and communicates these to the other ECUs. All have the capability to communicate over the SAE J1587 data link primarily for programming, diagnostics and data reporting.

In addition to their control functions, the modules have on board diagnostic (OBD) capabilities. The OBD is designed to detect faults or abnormal conditions that are not within normal operating parameters. When the system detects a fault or abnormal condition, the fault will be logged in one or both of the modules’ memory, the vehicle operator will be advised that a fault has occurred by illumination a malfunction indicator lamp (MIL) and a message in the driver information display, if equipped. The module may initiate the engine shutdown procedure if the system determines that the fault could damage the engine.

In some situations when a fault is detected, the system will enter a "derate" mode. The derate mode allows continued vehicle operation but the system may substitute a sensor or signal value that may result in reduced performance. In some instances, the system will continue to function but engine power may be limited to protect the engine and vehicle. Diagnostic trouble codes (DTCs) logged in the system memory can later be read, to aid in diagnosing the problem using a diagnostic computer or through the instrument cluster display, if equipped. When diagnosing an intermittent DTC or condition, it may be necessary to use a scan tool connected to the Serial Communication Port.

The use of a scan tool is necessary to perform diagnostic work as well as clearing of any diagnostic trouble codes (DTCs). DTC(s) can no longer be cleared using the vehicles instrument cluster digital display and stalk switch control. Additional data and diagnostic tests are available when a scan tool is connected to the Serial Communication Port.

For diagnostic software, contact your local dealer.

The ECM is a microprocessor based controller programmed to perform fuel injection quantity and timing control, diagnostic fault logging, and to broadcast data to other ECUs. The fuel quantity and injection timing to each cylinder is precisely controlled to obtain optimal fuel economy and reduced exhaust emissions in all driving situations.

The ECM controls the operation of the injectors, engine brake solenoid, EGR valve, turbocharger nozzle position, and cooling fan clutch based on inputs from many sensors and information received over the data links from other ECUs.

The VECU and ECM are dependent on each other to perform their specific control functions. In addition to switch and sensor data, the broadcast of data between modules also includes various calculations and conclusions that each module has developed, based on the input information it has received.

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

System Electronic Control Unit (ECU) Overview

The engine control module (ECM) monitors and models (using physical principles) engine parameters to monitor the engine system’s performance in real time. This is performed to aid the ECM with its self diagnostic capabilities. Many sensors are used for input to the emission control system.

The system contains the following “emission critical” ECUs that are monitored;

•Engine Control Module (ECM)

•Vehicle Electronic Control Unit (VECU)

•Aftertreatment Control Module (ACM)

•Aftertreatment Nitrogen Oxides (NOx) Sensors

•Engine Variable Geometry Turbocharger (VGT) Smart Remote Actuator (SRA)

These ECUs all communicate with the ECM via data links. The VECU communicates across the SAE J1939 (CAN1) data link while the others use the SAE J1939-7 (CAN2) data link.

The OBD systems use SAE J1939 data link protocol for communication with scan tools but, MACK trucks still are capable of communicating via the SAE J1587 data link for diagnostics. The use of a scan tool is necessary to perform diagnostic work as well as clearing of any diagnostic trouble codes (DTCs). DTC(s) can no longer be cleared using the vehicles instrument cluster digital display and stalk switch control.

There are other ECUs such as the Instrument Control Module (ICM), Transmission Control Module (TCM) and Anti-lock Brake System (ABS) Module that provide data to the emission control system or the diagnostic system but are not “emission critical”.

Malfunction Indicator Lamp (MIL), Description and Location

A MIL located in the instrument cluster. This amber colored lamp is used to inform the driver that a “emission critical” malfunction signal has occurred.

W2036007

SAE J1939 Data Link Communication

The electronic control units (ECUs) that communicate on the SAE J1939 data link, communicate according to the SAE J1587 standard. The diagnostic trouble codes (DTCs) set by the ECUs contain information that is described by the following abbreviations.

SA	Source Address:
	Identification of a control module.
SPN	Suspect Parameter Number:
	Identification of a parameter (value).
FMI	Failure Mode Identifier:
	Identification of fault types.

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

SAE J1939 FMI Table

FMI	SAE Text

0	Data valid but above normal operational range - Most severe level

1	Data valid but below normal operational range - Most severe level

2	Data erratic, intermittent or incorrect

3	Voltage above normal, or shorted to high source

4	Voltage below normal, or shorted to low source

5	Current below normal or open circuit

6	Current above normal or grounded circuit

7	Mechanical system not responding or out of adjustment

8	Abnormal frequency or pulse width or period

9	Abnormal update rate

10	Abnormal rate of change

11	Root cause not known

12	Bad intelligent device or component

13	Out of calibration

14	Special instructions

15	Data valid but above normal operating range - Least severe level

16	Data valid but above normal operating range - Moderately severe level

17	Data valid but below normal operating range - Least severe level

18	Data valid but below normal operating range - Moderately severe level

19	Received network data in error

20	Reserved for SAE assignment

21	Reserved for SAE assignment

22	Reserved for SAE assignment

23	Reserved for SAE assignment

24	Reserved for SAE assignment

25	Reserved for SAE assignment

26	Reserved for SAE assignment

27	Reserved for SAE assignment

28	Reserved for SAE assignment

29	Reserved for SAE assignment

30	Reserved for SAE assignment

31	Condition exists

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

SAE J1587 Data Link Communication

The electronic control units (ECUs) also communicate on the SAE J1587 data link. These ECUs communicate according to the SAE J1587 standard. The standard has been extended with MACK’s supplement (PPID, PSID). The diagnostic trouble codes (DTCs) set by the ECUs contain information that is described by the following abbreviations.

MID	Message Identification Description:
	Identification of a control module.
PID	Parameter Identification Description:
	Identification of a parameter (value).

PPID	Proprietary Parameter Identification
	Description Mack:
	Unique identification of a parameter (value).
SID	Subsystem Identification Description:
	Identification of a component.
PSID	Proprietary Subsystem Identification
	Description Mack:
	Unique identification of a component.
FMI	Failure Mode Identifier:
	Identification of fault types.

SAE J1587 FMI Table

FMI	SAE Text

0	Data valid, but above the normal working range

1	Data valid, but below the normal working range

2	Intermittent or incorrect data

3	Abnormally high voltage or short circuit to higher voltage

4	Abnormally low voltage or short circuit to lower voltage

5	Abnormally low current or open circuit

6	Abnormally high current or short circuit to ground

7	Incorrect response from a mechanical system

8	Abnormal frequency

9	Abnormal update rate

10	Abnormally strong vibrations

11	Non-identifiable fault

12	Faulty module or component

13	Calibration values outside limits

14	Special instructions

15	Reserved for future use

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

Diagnostic Trouble Code (DTC) Content

SPN 0–500

•“ECM SPN 84, Wheel-Based Vehicle Speed – MID 128 PID 84”, page 14

•“ECM SPN 91, Accelerator Pedal Position 1 – MID 128 PID 91”, page 14

•“ECM SPN 94, Engine Fuel Delivery Pressure – MID 128 PID 94”, page 14

•“ECM SPN 97, Water in Fuel Indicator – MID 128 PID 97”, page 15

•“ECM SPN 98, Engine Oil Level – MID 128 PID 98”, page 16

•“ECM SPN 100, Engine Oil Pressure – MID 128 PID 100”, page 17

•“ECM SPN 102, Engine Intake Manifold 1 Pressure – MID 128 PID 102”, page 17

•“ECM SPN 103, Engine Turbocharger 1 Speed – MID 128 PID 103”, page 18

•“ECM SPN 105, Engine Intake Manifold 1 Temperature – MID 128 PID 105”, page 19

•“ECM SPN 108, Barometric Pressure – MID 128 PID 108”, page 20

•“ECM SPN 110, Engine Coolant Temperature – MID 128 PID 110”, page 20

•“ECM SPN 111, Engine Coolant Level – MID 128 PID 111”, page 21

•“ECM SPN 153, Engine High Resolution Crankcase Pressure – MID 128 PID 153/PSID 23”, page 22

•“ECM SPN 158, Keyswitch Battery Potential – MID 128 PID 158/PSID 124”, page 23

•“ECM SPN 171, Ambient Air Temperature – MID 128 PID 171”, page 23

•“ECM SPN 173, Engine Exhaust Gas Temperature (EGT) – MID 128 PID 173 ”, page 24

•“ECM SPN 175, Engine Oil Temperature 1 – MID 128 PID 175”, page 25

•“ECM SPN 177, Transmission Oil Temperature – MID 128 PID 177”, page 26

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

•“ECM SPN 188, Engine Speed At Idle, Point 1 (Engine Configurations) – MID 128 PID 188”, page 26

•“ECM SPN 190, Engine Speed – MID 128 PID 190”, page 27

•“ECM SPN 228, Speed Sensor Calibration – MID 128 PID 228”, page 27

•“ECM SPN 237, Vehicle Identification Number – MID 128 PSID 161/162”, page 27

•“ECM SPN 245, Total Vehicle Distance – MID 128 PID 245”, page 28

•“ECM SPN 251, Time – MID 128 PID 251”, page 28

•“ECM SPN 252, Date – MID 128 PID 252”, page 29

•“ECM SPN 411, Engine Exhaust Gas Recirculation Differential Pressure – MID 128 PID 411”, page 29

•“ECM SPN 412, Engine Exhaust Gas Recirculation Temperature – MID 128 PID 412”, page 30

SPN 500–999

•“ECM SPN 558, Accelerator Pedal 1 Idle Validation Switch

–MID 128 SID 230”, page 31

•“ECM SPN 626, Intake Air Heater (IAH) Relay – MID 128 PID 45”, page 32

•“ECM SPN 628, Program Memory – MID 128 SID 240”, page 32

•“ECM SPN 629, Electronic Control Unit (ECU) 1 – MID 128 SID 254”, page 33

•“ECM SPN 630, Calibration Memory – MID 128 SID 253”, page 33

•“ECM SPN 631, Calibration Module – MID 128 PSID 77/PSID 124”, page 34

•“ECM SPN 633, Engine Fuel Actuator 1 Control Command

–MID 128 SID 18”, page 34

•“ECM SPN 636, Camshaft Position Sensor (CMP) – MID 128 SID 21”, page 35

•“ECM SPN 637, Crankshaft Position Sensor (CKP) – MID 128 SID 22”, page 36

•“ECM SPN 639, SAE J1939 Data Link 1 – MID 128 SID 231”, page 37

•“ECM SPN 641, Engine Variable Geometry Turbocharger (VGT) Actuator 1 – MID 128 SID 27”, page 37

•“ECM SPN 642, Engine Variable Geometry Turbocharger (VGT) Actuator 2 – MID 128 PPID 89”, page 38

•“ECM SPN 647, Engine Fan Clutch Output Device Driver – MID 128 SID 33”, page 38

•“ECM SPN 651, Engine Injector Cylinder 1 – MID 128 SID 1”, page 39

•“ECM SPN 652, Engine Injector Cylinder 2 – MID 128 SID 2”, page 40

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

•“ECM SPN 653, Engine Injector Cylinder 3 – MID 128 SID 3”, page 40

•“ECM SPN 654, Engine Injector Cylinder 4 – MID 128 SID 4”, page 41

•“ECM SPN 655, Engine Injector Cylinder 5 – MID 128 SID 5”, page 42

•“ECM SPN 656, Engine Injector Cylinder 6 – MID 128 SID 6”, page 43

•“ECM SPN 677, Engine Starter Motor Relay – MID 128 SID 39”, page 43

•“ECM SPN 729, Intake Air Heater (IAH) 1 – MID 128 SID 70”, page 44

•“ECM SPN 730, Intake Air Heater (IAH) 2 – MID 128 SID 71”, page 44

•“ECM SPN 975, Estimated Percent Fan Speed – (MID 128 PID 26)”, page 45

SPN 1000–1999

•“ECM SPN 1072, Engine Compression Brake Output #1 – MID 128 PPID 122”, page 46

•“ECM SPN 1127, Engine Turbocharger Intake Manifold Pressure (IMP) – MID 128 PSID 98”, page 47

•“ECM SPN 1136, Engine Control Module (ECM) Temperature – MID 128 PPID 55”, page 48

•“ECM SPN 1198, Anti–theft Random Number – MID 128 PID 224”, page 48

•“ECM SPN 1231, SAE J1939 Data Link 2 – MID 128 PSID 229/232”, page 49

•“ECM SPN 1265, Engine Piston Cooling Oil Pressure Actuator – MID 128 SID 85”, page 49

•“ECM SPN 1322, Engine Misfire for Multiple Cylinders – MID 128 PSID 27”, page 50

•“ECM SPN 1659, Engine Coolant System Thermostat – MID 128 PSID 109”, page 50

•“ECM SPN 1675, Engine Starter Mode – MID 128 SID 39”, page 50

•“ECM SPN 1677, Aftertreatment DPF Auxiliary Heater Mode – MID 128 PSID 25”, page 51

•“ECM SPN 1761, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Level – PPID 278”, page 51

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

SPN 2000–2999

•“ECM SPN 2003, Transmission Control Module (TCM) Status – MID 128 PSID 205”, page 52

•“ECM SPN 2017, Cruise Control Status – MID 128 PID 85”, page 52

•“ECM SPN 2029, Invalid or Missing Data from Vehicle ECU

– MID 128 PSID 201”, page 52

•“ECM SPN 2629, Engine Turbocharger Compressor Outlet Temperature – MID 128 PID 404”, page 53

•“ECM SPN 2659, Engine Exhaust Gas Recirculation (EGR) Mass Flow Rate – MID 128 PPID 35”, page 53

•“ECM SPN 2791, Engine Exhaust Gas Recirculation (EGR) Valve Control – MID 128 SID 146”, page 54

•“ECM SPN 2836, Battery Potential/Switched Voltage – MID 128 PSID 49”, page 54

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

SPN 3000–3999

•“ECM SPN 3031, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Temperature – MID 128 PPID 274”, page 55

•“ECM SPN 3064, Aftertreatment DPF System Monitor – MID 128 PPID 326”, page 55

•“ECM SPN 3216, Aftertreatment Intake NOx – MID 128 PPID 348”, page 56

•“ECM SPN 3226, Aftertreatment Outlet NOx – MID 128 PPID 270/ PSID 90”, page 56

•“ECM SPN 3245, Aftertreatment DPF Outlet Temperature – MID 128 PPID 436”, page 57

•“ECM SPN 3249, Aftertreatment DPF Intake Temperature

–MID 128 PPID 387”, page 58

•“ECM SPN 3250, Aftertreatment Diesel Particulate Filter (DPF) Intermediate Gas Temperature – MID 128 PPID 440/ PSID 22”, page 59

•“ECM SPN 3251, Aftertreatment DPF Differential Pressure

–MID 128 PID 81”, page 60

•“ECM SPN 3363, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater – MID 128 PSID 75”, page 61

•“ECM SPN 3471, Aftertreatment Fuel Pressure Control Actuator/ MP8 Engine– MID 128 PPID 328”, page 61

•“ECM SPN 3471, Aftertreatment Fuel Pressure Control Actuator/ MP7 Engine – MID 128 PSID 111”, page 62

•“ECM SPN 3472, Aftertreatment Diesel Particulate Filter (DPF) Air Pressure Control Actuator– MID 128 PSID 58”, page 63

•“ECM SPN 3473, Aftertreatment Failed to Ignite – MID 128 PSID 22”, page 64

•“ECM SPN 3480, Aftertreatment Diesel Particulate Filter (DPF) Fuel Pressure/ MP8 Engine – MID 128 PPID 437/PSID 108”, page 64

•“ECM SPN 3480, Aftertreatment Diesel Particulate Filter (DPF) Fuel Pressure/ MP7 Engine – MID 128 PPID 437”, page 65

•“ECM SPN 3482, Aftertreatment Diesel Particulate Filter (DPF) Fuel Shutoff Valve – MID 128 PPID 328”, page 66

•“ECM SPN 3483, Aftertreatment Regeneration Status – MID 128 PSID 47”, page 66

•“ECM SPN 3484, Aftertreatment Ignition – MID 128 PSID 110/PSID 127”, page 67

•“ECM SPN 3485, Aftertreatment Diesel Particulate Filter (DPF) Atomization Air Pressure – MID 128 PPID 277”, page 68

•“ECM SPN 3489, Aftertreatment Air Enable Actuator – MID 128 PSID 122”, page 69

•“ECM SPN 3491, Aftertreatment Diesel Particulate Filter (DPF) Atomization Air Actuator – MID 128 PSID 59”, page 70

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

•“ECM SPN 3509, Sensor Supply Voltage 1 – MID 128 SID 232”, page 71

•“ECM SPN 3510, Sensor Supply Voltage 2 – MID 128 SID 211”, page 71

•“ECM SPN 3511, Sensor Supply Voltage 3 – MID 128 PSID 113”, page 72

•“ECM SPN 3512, Sensor Supply Voltage 4 – MID 128 PSID 126”, page 72

•“ECM SPN 3522, Aftertreatment Total Fuel Used – MID 128 PSID 91”, page 72

•“ECM SPN 3556, Aftertreatment Hydrocarbon Doser/ MP8 Engine – MID 128 PPID 329”, page 73

•“ECM SPN 3556, Aftertreatment Hydrocarbon Doser/ MP7 Engine – MID 128 PPID 329”, page 74

•“ECM SPN 3597, Aftertreatment Diesel Particulate Filter (DPF) Regeneration too Frequent – MID 128 PSID 119”, page 74

•“ECM SPN 3675, Engine Turbocharger Compressor Bypass Valve Position – MID 128 PPID 330”, page 75

•“ECM SPN 3695, Aftertreatment Diesel Particulate Filter (DPF) Switch/MP8 Engine – MID 128 PSID 114”, page 76

•“ECM SPN 3720, Aftertreatment DPF Ash Load Percent – MID 128 PPID 337”, page 76

•“ECM SPN 3936, Aftertreatment DPF System – MID 128 PSID 28”, page 77

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

SPN 4000–5500

•“ECM SPN 4094, NOx Limits Exceeded Due to Insufficient Diesel Exhaust Fluid (DEF) Quality – MID 128 PSID 90”, page 77

•“ECM SPN 4095, NOx Limits Exceeded Due to Interrupted Diesel Exhaust Fluid (DEF) Dosing – MID 128 PSID 90”, page 77

•“ECM SPN 4334, Afterteatment Diesel Exhaust Fluid (DEF) Dosing Absolute Pressure – MID 128 PPID 273”, page 78

•“ECM SPN 4339, Aftertreatment SCR Feedback Control Status – MID 128 PSID 90”, page 78

•“ECM SPN 4354, Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1 – MID 128 PSID 103”, page 79

•“ECM SPN 4356, Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3 – MID 128 PSID 102”, page 79

•“ECM SPN 4374, Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor Speed – MID 128 PSID 87”, page 79

•“ECM SPN 4375, Aftertreatment Diesel Exhaust Fluid Pump (DEF) Drive Percentage – MID 128 PSID 121”, page 80

•“ECM SPN 4376, Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve – MID 128 PSID 105”, page 81

•“ECM SPN 4752, Engine Exhaust Gas Recirculation (EGR) Cooler Efficiency – MID 128 SID 282”, page 81

•“ECM SPN 4811, Engine Piston Cooling Oil Pressure – MID 128 PPID 8”, page 81

•“ECM SPN 4813, Engine Oil Thermostat Bypass Valve Opening – MID 128 PSID 72”, page 82

•“ECM SPN 4815, Engine Cooling Fan Thermal Switch Position – MID 128 PPID 333”, page 82

•“ECM SPN 5246, Aftertreatment SCR Operator Inducement Severity – MID 128 PSID 46”, page 83

•“ECM SPN 5285, Charge Air Cooler (CAC) Temperature – MID 128 PID 52”, page 84

•“ECM SPN 5298, Aftertreatment Diesel Oxidation Catalyst (DOC) Conversion Efficiency – MID 128 PSID 99”, page 84

•“ECM SPN 5392, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve Loss of Prime – MID 128 PSID 121”, page 85

•“ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve – MID 128 PSID 89”, page 85

•“ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve – MID 128 PSID 90”, page 86

•“ECM SPN 5485, Aftertreatment Diesel Exhaust Fluid (DEF) Pump Orifice – MID 128 PSID 121”, page 86

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 84, Wheel-Based Vehicle Speed – MID 128 PID 84

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 9	•	Abnormal update	•	Missing signal	•	Engine derate	•	SAE J1587 data link vehicle speed
		rate		from VECU			•	message does not exist, (VECU error)
							•	VECU
FMI 10	•	Abnormal rate of	•	Vehicle speed	•	MIL illuminated	•	Vehicle speed sensor (VSS)
		change		deemed		(13L engine only)	•	VECU
				inaccurate by
				VECU

FMI 13	•	Out of calibration	•	No vehicle speed	•	MIL illuminated	•	Vehicle speed sensor (VSS)
				available to VECU		(13L engine only)	•	VECU
FMI 19	•	Received network	•	Vehicle speed	•	MIL illuminated	•	Vehicle speed sensor (VSS)
		data in error		deemed		(13L engine only)	•	VECU
				inaccurate by
				VECU

ECM SPN 91, Accelerator Pedal Position 1 – MID 128 PID 91

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 9	•	Abnormal update	•	Missing signal	•	N/A	•	SAE J1587 data link pedal information
		rate		from VECU				not available
FMI 13	•	Out of calibration	•	Pedal not	•	MIL illuminated	•	Accelerator pedal sensor fault
				connected to		(13L engine only)
				VECU

FMI 10	•	Abnormal rate of	•	Pedal position	•	MIL illuminated	•	Accelerator pedal sensor fault
		change		deemed		(13L engine only)
				inaccurate by
				VECU

FMI 19	•	Received network	•	Pedal position	•	MIL illuminated	•	Accelerator pedal sensor fault
		data in error		deemed		(13L engine only)
				inaccurate by
				VECU

ECM SPN 94, Engine Fuel Delivery Pressure – MID 128 PID 94

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Low fuel pressure	•	N/A	•	Damaged contacts in harness
		normal, or shorted		sensor signal line			•	Faulty fuel pressure sensor
		to high source		voltage			•	Open circuit.
							•	Open circuit.
FMI 5	•	Current below	•	Low fuel pressure	•	N/A	•	Damaged contacts in harness
		normal or open		sensor signal line			•	Faulty fuel pressure sensor
		circuit		voltage

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 7	•	Mechanical system	•	Drop in fuel	•	Engine derate	•	Clogged fuel filter
		not responding		pressure			•	Faulty fuel pressure sensor
		properly					• Leaking fuel line or fitting
							• Leaking fuel line or fitting
							•	Poor fuel pump response
FMI 13	•	Out of Calibration	•	Sensor indicates a	•	N/A	•	Wiring harness
				invalid value			• Faulty fuel pressure sensor
							•	Clogged fuel filter
FMI 15	• Data valid but above		•	Sensor indicates a	•	N/A	•	Wiring harness
		normal operating		invalid value			•	Faulty fuel pressure sensor
		range - Least severe
		level

FMI 17	• Data valid but below		•	Sensor indicates a	•	N/A	•	Wiring harness
		normal operating		invalid value			•	Faulty fuel pressure sensor
		range - Least severe					•	Clogged fuel filter
		level					•	Clogged fuel filter

FMI 18	• Data valid but below		•	Drop in fuel	•	Engine derate	•	Clogged fuel filter
		normal operating		pressure			•	Faulty fuel pressure sensor
		range - Moderately					• Leaking fuel line or fitting
		severe level					• Leaking fuel line or fitting
							•	Poor fuel pump response
ECM SPN 97, Water in Fuel Indicator – MID 128 PID 97

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Water in fuel is	•	Uneven running	•	Water in fuel
		normal operational		indicated	•	Engine stalling
		range - Most severe
		level

FMI 3	•	Voltage above	•	N/A	•	Undetected water	•	Open circuit
		normal, or shorted			•	in fuel supply
		to high source			•	Uneven running
					•	Engine stalling
FMI 4	•	Voltage below	•	N/A	•	Undetected water	•	Short to ground
		normal, or shorted			•	in fuel supply	•	Open circuit
		to low source				Uneven running	•	Faulty sensor
						Uneven running	•	Faulty sensor

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 98, Engine Oil Level – MID 128 PID 98

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 1	• Data valid but above		•	Critically below	•	Red engine	• Low oil level leakage
		normal operational		range		shutdown or	• Critically low oil level
		range				yellow electronic
						malfunction
						lamps illuminated
						dependent of
						severity

FMI 4	•	Voltage below	•	Short Circuit -	•	Oil level can not	• Engine Oil Level (EOL) sensor failure
		normal, or shorted		Positive side		be measured	• Faulty harness
		to low source
FMI 5	•	Current below	•	Short Circuit +,	•	Oil level can not	• Engine Oil Level (EOL) sensor failure
		normal or open	•	Positive side		be measured	• Faulty harness
		circuit	•	Open Circuit +,
			•	Positive side
			•	Open Circuit-
				Negative side

FMI 18	• Data valid but below		•	Moderately below	•	Red engine	• Low oil level leakage
		normal operating	•	range		shutdown or	• Moderately low oil level
		range - Moderately	•	Critically below		Yellow electronic
		severe level		range		malfunction
				range		lamps illuminated
						lamps illuminated
						dependent of
						severity

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 100, Engine Oil Pressure – MID 128 PID 100

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 1	• Data valid but below		•	Critically below	•	Engine derate	•	Oil leakage
		normal operational		range	•	Low pressure	•	Broken oil pump
		range			•	Red engine	•	Clogged oil system
					•	Red engine	•	Clogged oil system
						shutdown lamp
						illuminated

FMI 3	•	Voltage below	•	Short Circuit +,	•	Oil pressure	•	Engine Oil Pressure (EOP) sensor
		normal or shorted	•	Measuring line		shows 0 in the	•	failure
		low	•	Open Circuit,		cluster, engine is	•	Faulty harness
				Ground line	•	running
				Ground line		Yellow electronic
						Yellow electronic
						malfunction lamp
						illuminated

FMI 5	•	Current below	• Open Circuit +, 5V		•	Oil pressure	•	Engine Oil Pressure (EOP) sensor
		normal or open	•	Supply line		shows 0 in the	•	failure
		circuit	•	Short Circuit -,		cluster, engine is	•	Faulty harness
				Measuring line	•	running
			•	Measuring line		Yellow electronic
			•	Open Circuit,		Yellow electronic
				Measuring line		malfunction lamps
				Measuring line		illuminated
						illuminated

FMI 13	•	Out of Calibration	•	Sensor indicates a	•	Oil pressure	•	Engine Oil Pressure (EOP) sensor
				invalid value		shows 0 in the	•	failure
						cluster, engine is	•	Faulty harness
						running
FMI 15	• Data valid but above		•	Sensor indicates a	•	Oil pressure	•	Engine Oil Pressure (EOP) sensor
		normal operating		invalid value		shows 0 in the	•	failure
		range - Least severe				cluster, engine is	•	Faulty harness
		level				running
FMI 17	• Data valid but below		•	Sensor indicates a	•	Oil pressure	•	Engine Oil Pressure (EOP) sensor
		normal operating		invalid value		shows 0 in the	•	failure
		range - Least severe				cluster, engine is	•	Faulty harness
		level				running
ECM SPN 102, Engine Intake Manifold 1 Pressure – MID 128 PID 102

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Intake Manifold	•	Engine derate	•	Faulty harness
		intermittent or		Pressure Sensor	•	MIL lamp	• Intake Manifold Pressure sensor
		incorrect		output is too high		illuminated
				or too low		illuminated
				or too low

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 3	•	Voltage above	•	A short to battery	•	Engine derate	•	Faulty harness
		normal, or shorted		in the metering	•	MIL lamp	•	Harness connectors
		to high source	•	circuit		illuminated	•	Intake Manifold Pressure sensor
				An open in the		illuminated	•	Intake Manifold Pressure sensor
				An open in the
				ground circuit
				of the Intake
				Manifold Pressure
				Sensor

FMI 5	•	Current below	•	A short to ground	•	Engine derate	•	Faulty harness
		normal or open	•	in the harness	•	MIL lamp	•	Harness connectors
		circuit		An open in the 5		illuminated	•	Intake Manifold Pressure sensor
				An open in the 5		illuminated	•	Intake Manifold Pressure sensor
			•	volt supply circuit
			•	An open in the
				metering circuit

FMI 12	•	Bad intelligent	•	Intake Manifold	•	Engine derate	•	Faulty harness
		device or		Pressure sensor	•	MIL lamp	•	Intake Manifold Pressure sensor
		component	•	output is too high		illuminated
				Sensor indicates		illuminated
				Sensor indicates
				a invalid value

FMI 13	•	Out of Calibration	•	Sensor indicates	•	Engine derate	•	Faulty harness
				a invalid value	•	MIL lamp	•	Harness connectors
						illuminated	• Intake Manifold Pressure sensor
FMI 14	•	Special instructions	•	Intake Manifold	•	Engine derate	•	Faulty harness
				Pressure sensor	•	MIL lamp	•	Intake Manifold Pressure sensor
			•	output is too low		illuminated	•	Inlet air leakage
				Sensor indicates		illuminated	•	Inlet air leakage
				Sensor indicates
				a invalid value

FMI 15	• Data valid but above		•	Intake Manifold	•	Engine derate	•	Faulty harness
		normal operating		Pressure sensor	•	MIL lamp	•	Harness connectors
		range - Least severe		output is too high		illuminated	• Intake Manifold Pressure sensor
		level				illuminated
		level

FMI 17	• Data valid but below		•	Sensor indicates	•	Engine derate	•	Faulty harness
		normal operating		a invalid value	•	MIL lamp	•	Harness connectors
		range - Least severe				illuminated	• Intake Manifold Pressure sensor
		level				illuminated
		level

ECM SPN 103, Engine Turbocharger 1 Speed – MID 128 PID 103

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Turbocharger	•	Engine derate	•	Miss detection
		normal operational		speed is at least	•	MIL illuminated	•	Faulty harness
		range		25% greater than			•	Faulty harness connector
				the target wheel			•	Faulty harness connector
				speed for the			•	Turbocharger Speed Sensor
				measured boost

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 1	• Data valid but below		•	Turbocharger	•	Engine derate	•	Miss detection
		normal operational		speed is at least	•	MIL illuminated	•	Faulty harness
		range - Most severe		25% less than			•	Faulty harness connector
		level		the target wheel			•	Faulty harness connector
				speed for the			•	Turbocharger Speed Sensor
				measured boost
FMI 9	•	Abnormal update	• A fault is logged if		•	Engine derate	•	Faulty harness
		rate		the Turbocharger	•	MIL illuminated	•	Faulty harness connector
				Speed Sensor			•	Turbocharger Speed Sensor
				signal is lost			•	Turbocharger Speed Sensor

FMI 15	• Data valid but above		•	Turbocharger	•	Engine derate	•	Miss detection
		normal operating		speed is at least	•	MIL illuminated	•	Faulty harness
		range - Least severe		25% greater than			•	Faulty harness connector
		level		the target wheel			•	Faulty harness connector
				speed for the			•	Turbocharger Speed Sensor
				measured boost
FMI 17	• Data valid but below		•	Turbocharger	•	Engine derate	•	Miss detection
		normal operating		speed is at least	•	MIL illuminated	•	Faulty harness
		range - Least severe		25% less than			•	Faulty harness connector
		level		the target wheel			•	Faulty harness connector
				speed for the			•	Turbocharger Speed Sensor
				measured boost
ECM SPN 105, Engine Intake Manifold 1 Temperature – MID 128 PID 105

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Sensor indicates a	•	Engine derate	•	Poor cooling
		normal operational		invalid value			•	Extreme running conditions
		range - Most severe
		level

FMI 2	•	Data erratic,	•	The Intake	•	Engine derate	•	Poor cooling
		intermittent or		Manifold	•	MIL illuminated	•	Extreme running conditions
		incorrect		Temperature			• Engine Intake Manifold sensor
				sensor output is			• Engine Intake Manifold sensor
				too high or too low			•	Faulty harness
							•	Faulty harness connector
							•	Ambient Air Temperature sensor
FMI 4	•	Voltage below	•	N/A	•	Difficult to start in	•	Engine Intake Manifold sensor
		normal, or shorted			•	cold climates	•	Faulty harness
		to low source				Minor cold engine	•	Faulty harness connector
						Minor cold engine	•	Faulty harness connector
					•	smoke
					•	Engine derate
					•	MIL illuminated
FMI 5	•	Current below	•	Possible short to	•	Difficult to start in	•	Engine Intake Manifold sensor
		normal or open		sensor	•	cold climates	•	Faulty harness
		circuitt				Engine derate	•	Faulty harness connector
						Engine derate	•	Faulty harness connector
					•	MIL illuminated

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 13	•	Out of Calibration	•	The sensor output	•	Engine derate	•	Engine Intake Manifold sensor
				is showing a	•	Minor cold engine	•	Faulty harness
				constant value		smoke	•	Faulty harness connector
					•	smoke	•	Faulty harness connector
					•	MIL illuminated
FMI 17	• Data valid but below		•	The sensor output	•	Engine derate	•	Engine Intake Manifold sensor
		normal operating		is showing a	•	Minor cold engine	•	Faulty harness
		range - Least severe		constant value		smoke	•	Faulty harness connector
		level			•	smoke
		level				MIL illuminated
						MIL illuminated
ECM SPN 108, Barometric Pressure – MID 128 PID 108

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Barometric	•	Minor engine	•	Faulty Sensor
		intermittent or		Pressure sensor	•	derate	•	Faulty Engine Control Module
		incorrect		output is too high	•	MIL illuminated
				or too low
FMI 3	•	Voltage above	• Short to battery on		•	MIL illuminated	•	Internal fault in the Engine Control
		normal, or shorted		the metering side			•	Module
		to high source					•	Faulty Sensor
FMI 4	•	Voltage below	• A short to ground		•	MIL illuminated	•	Internal fault in the Engine Control
		normal, or shorted		on the metering			•	Module
		to low source		side			•	Faulty Sensor
ECM SPN 110, Engine Coolant Temperature – MID 128 PID 110

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Coolant	•	Engine derate	•	Extreme driving condition
		normal operational		temperature	•	Red engine	•	Faulty coolant thermostat
		range - Most severe		indicates critical		shutdown lamp	•	Malfunctioning fan
		level		limit		shutdown lamp
		level		limit		illuminated
						illuminated	•	Blocked radiator
							•	Blocked radiator
FMI 2	•	Data erratic,	•	Engine Coolant	•	May affect	•	Faulty Sensor
		intermittent or		Temperature		driveability in	•	Faulty harness
		incorrect		sensor output is	•	extreme cases	•	Faulty coolant thermostat
				too high or too low		MIL illuminated	•	Faulty coolant thermostat
				too high or too low		MIL illuminated
FMI 4	•	Voltage below	•	Engine Coolant	•	Difficult to start in	•	Faulty Sensor
		normal or shorted		Temperature	•	cold climates	•	Faulty harness
		low		sensor voltage	•	Idle run regulation
				too low		is deteriorated
					•	is deteriorated
					•	MIL illuminated
FMI 5	•	Current below	•	N/A	•	Difficult to start in	•	Faulty Sensor
		normal or open			•	cold climates	•	Faulty harness
		circuit			•	Idle run regulation
					•	is deteriorated
					•	MIL illuminated

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 10	•	Abnormal rate of	•	Engine Coolant	•	May affect vehicle	•	Faulty Sensor
		change		Temperature	•	driveability	•	Faulty harness
				sensor output	•	MIL illuminated
				is showing a
				constant value

FMI 13	•	Out of Calibration	•	Sensor out of	•	MIL illuminated	•	Faulty Sensor
			•	range
			•	Sensor indicates a
				invalid value

FMI 16	• Data valid but above		•	Coolant	•	Engine derate	•	Extreme driving condition
		normal operating		temperature	•	Yellow electronic	•	Faulty coolant thermostat
		range - Moderately		indicates		malfunction lamp	•	Malfunctioning fan
		severe level		moderate upper		malfunction lamp	•	Malfunctioning fan
				limit		illuminated	•	Blocked radiator
				limit			•	Blocked radiator
FMI 17	• Data valid but below		•	Sensor out of	•	MIL illuminated	•	Faulty Sensor
		normal operating	•	range
		range - Least severe	•	Sensor indicates a
		level		invalid value
				invalid value

ECM SPN 111, Engine Coolant Level – MID 128 PID 111

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 1	• Data valid but below		•	Critically below	•	Engine derate	• Coolant level below range
		normal operational	•	range	•	Red engine	•	Faulty harness
		range - Most severe	•	Coolant level can		shutdown lamp
		level		not be detected		illuminated
				not be detected	•	illuminated
					•	Coolant level can
						not be detected

FMI 3	•	Voltage above	•	Short Circuit +,	•	Coolant level can	•	Faulty harness
		normal, or shorted	•	measuring line	•	not be detected	•	Faulty harness connector
		to high source		Coolant level can		Yellow electronic	•	Faulty level sensor
				Coolant level can		Yellow electronic	•	Faulty level sensor
				not be detected		malfunction lamp
						illuminated

FMI 4	•	Voltage below	•	Short Circuit -,	•	Coolant level can	•	Faulty harness
		normal, or shorted	•	measuring line	•	not be detected	•	Faulty harness connector
		to low source		Coolant level can		Yellow electronic	•	Faulty level sensor
				Coolant level can		Yellow electronic	•	Faulty level sensor
				not be detected		malfunction lamp
						illuminated

FMI 5	•	Current below	•	Open Circuit	•	Coolant level can	•	Faulty harness
		normal or open	•	Coolant level can	•	not be detected	•	Faulty harness connector
		circuit		not be detected		Yellow electronic	•	Faulty level sensor
				not be detected		Yellow electronic	•	Faulty level sensor
						malfunction lamp
						illuminated

Group 28					Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 14	• Special instructions	•	Sensor out of	•	Coolant level can	•	Faulty harness
		•	range	•	not be detected	•	Faulty harness connector
		•	Sensor indicates a	•	Yellow electronic	•	Faulty level sensor
			invalid value		malfunction lamp
					illuminated

FMI 18	• Data valid but below	•	Sensor out of	•	Coolant level can	•	Faulty harness
	normal operating	•	range	•	not be detected	•	Faulty harness connector
	range - Moderately		Sensor indicates a		Yellow electronic	•	Faulty level sensor
	severe level		Sensor indicates a		Yellow electronic	•	Faulty level sensor
			invalid value		malfunction lamp
					illuminated

ECM SPN 153, Engine High Resolution Crankcase Pressure – MID 128 PID 153/PSID 23

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Out of range, max	•	Red engine	• Piston ring blow-by
		normal operational	•	voltage, illegal		shutdown lamp
		range - Most severe	•	Critically Above	•	illuminated
		level		Range	•	Forced idle
					•	Engine shut down
FMI 2	•	Data erratic,	•	Crankcase	•	MIL illuminated	• Faulty Crank Case Pressure senor
		intermittent or		pressure			• Faulty harness
		incorrect		indication to high
				or to low a value

FMI 3	•	Voltage above	•	Short Circuit +,	•	MIL illuminated	• Faulty Crank Case Pressure senor
		normal or shorted to	•	Measuring line	•	Yellow electronic	• Faulty harness
		high source	•	Open Circuit,		malfunction lamp
				Ground line		illuminated

FMI 5	•	Current below	•	Open Circuit +, 5V	•	MIL illuminated	• Faulty Crank Case Pressure senor
		normal or open	•	Supply Line	•	Yellow electronic	• Faulty harness
		circuit	•	Short Circuit -,		malfunction lamp
			•	measuring line		illuminated
			•	Open Circuit,
				measuring line

FMI 7	•	Mechanical system	•	Leakage detected	•	MIL illuminated	• Faulty separator, hoses or pipes
		not responding or		in the crankcase
		out of adjustment		ventilation system

FMI 13	•	Out of Calibration	•	Sensor out of	•	MIL illuminated	• Faulty Sensor
			•	range
			•	Sensor indicates a
				invalid value

Group 28					Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 15	• Data valid but above	•	Sensor out of	•	MIL illuminated	•	Faulty Sensor
	normal operating	•	range
	range - Least severe	•	Sensor indicates a
	level		invalid value
			invalid value

FMI 17	• Data valid but below	•	Sensor out of	•	MIL illuminated	•	Faulty Sensor
	normal operating	•	range
	range - Least severe	•	Sensor indicates a
	level		invalid value
			invalid value

ECM SPN 158, Keyswitch Battery Potential – MID 128 PID 158/PSID 124

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Engine Control	•	N/A	•	Charging system fault
		normal operational		Module battery			•	External charger
		range		voltage too high			•	Engine control module (ECM)
							•	Engine control module (ECM)
FMI 1	• Data valid but below		•	Engine Control	•	Starter will not	•	Charging system fault
		normal operational		Module battery		crank	•	Battery
		range		voltage too low			•	Ground connection
							•	Ground connection
FMI 3	•	Voltage above	•	Engine Control	•	N/A	•	Charging system fault
		normal, or shorted		Module battery			•	External charger
		to high source		voltage too high			•	Engine control module (ECM)
							•	Engine control module (ECM)
FMI 4	•	Voltage below	•	Engine Control	•	Starter will not	•	Charging system fault
		normal, or shorted		Module battery		crank	•	Battery
		to low source		voltage too low			•	Ground connection
							•	Ground connection
FMI 16	• Data valid but above		•	Engine Control	•	N/A	•	Charging system fault
		normal operating		Module battery			•	External charger
		range - Moderately		voltage too high			• Engine control module (ECM)
		severe level					• Engine control module (ECM)

FMI 18	• Data valid but below		•	Engine Control	•	Starter will not	•	Charging system fault
		normal operating		Module battery		crank	•	Battery
		range - Moderately		voltage too low			•	Ground connection
		severe level					•	Ground connection

ECM SPN 171, Ambient Air Temperature – MID 128 PID 171

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Key ON, Ambient	•	N/A	•	Faulty instrument cluster
		intermittent or		Air Temperature			•	Faulty harness
		incorrect		message missing
				on SAE J1939 and
				SAE J1587 data
				links

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 9	•	Abnormal Update	•	Key ON, Ambient	•	N/A	•	Faulty instrument cluster
		Rate		Air Temperature			•	Faulty harness
				message missing
				on SAE J1587
				data link

FMI 10	•	Abnormal rate of	•	Ambient	•	MIL illuminated	•	Faulty instrument cluster
		change		Temperature		(13L engine only)
				sensor signal fault

FMI 12	•	Bad intelligent	•	Loss of SAE	•	MIL illuminated	•	Faulty instrument cluster
		device or		J1939 data link		(13L engine only)	•	Faulty harness
		component		communication
				between Engine
				Control Module
				and Instrument
				Cluster Control
				Module

FMI 13	•	Out of calibration	•	Ambient	•	MIL illuminated	•	Faulty instrument cluster/harness or
				Temperature		(13L engine only)		cluster harness connectors
			•	sensor signal fault
			•	No ambient
				temperature
				calculated by
			•	Vehicle ECU
			•	No valid ambient
				temperature
				received by
				Engine Control
				Module

FMI 14	•	Special instructions	•	Ambient	•	MIL illuminated	•	Ambient Temperature sensor signal
				Temperature				missing from Vehicle ECU
				sensor signal fault

FMI 19	•	Received network	•	Ambient	•	MIL illuminated	•	Faulty instrument cluster
		data in error		Temperature		(13L engine only)
				sensor signal fault

ECM SPN 173, Engine Exhaust Gas Temperature (EGT) – MID 128 PID 173

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Exhaust Gas	•	Engine derate	•	Faulty harness
		normal operational		Temperature is	•	Poor driveability	•	Faulty harness connector
		range - Most severe		critically high	•	Regeneration is	•	Intake air leak
		level			•	Regeneration is	•	Intake air leak
						not possible
FMI 2	•	Data erratic,	•	Sensor is not	•	MIL illuminated	•	Faulty harness
		intermittent or		rational	•	Regeneration is	•	Faulty harness connector
		incorrect				not possible	•	Exhaust leak
						not possible	•	Exhaust leak
							•	Intake air leak
							•	Sensor failure

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 4	•	Voltage below	•	Short to ground on	•	MIL illuminated	•	Sensor failure
		normal, or shorted		the metering side	•	Regeneration is	•	Faulty harness
		to low source		of the circuit		not possible	•	Faulty harness connector
						not possible	•	Faulty harness connector
							• Aftertreatment control module (ACM)
FMI 5	•	Current below	•	Short to battery on	•	MIL illuminated	•	Faulty harness
		normal or open		the metering side			•	Sensor failure
		circuit	•	of the circuit			•	Faulty harness connector
				Open in the			•	Faulty harness connector
				Open in the
				metering side of
			•	the circuit
			•	Open in the
				ground side of
				the circuit

FMI 15	• Data valid but above		•	Sensor out of	•	MIL illuminated	•	Sensor failure
		normal operating	•	range			•	Faulty harness
		range - Least severe	•	Sensor indicates a
		level		invalid value
				invalid value

FMI 16	• Data valid but above		•	Exhaust Gas	•	Engine derate	•	Faulty harness
		normal operating		Temperature is	•	Poor driveability	•	Faulty harness connector
		range - Moderately		moderately too			•	Intake air leak
		severe level		high			•	Intake air leak

ECM SPN 175, Engine Oil Temperature 1 – MID 128 PID 175

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Extreme driving	•	Red engine	•	Extreme driving conditions
		normal operational	•	conditions		shutdown lamp	•	Engine cooling fan
		range - Most severe	•	Engine oil	•	illuminated	•	Oil thermostat
		level		temperature	•	Engine derate	•	Coolant system
				critically above			•	Coolant system
				range			•	Clogged oil cooler
FMI 2	•	Data erratic,	•	Engine oil	•	MIL illuminated	• Engine Oil Temperature (EOT) sensor
		intermittent or		temperature	•	(13L engine only)	•	failure
		incorrect		sensor indicating	•	In some cases	•	Faulty harness
				too high or too low		may have
				a value (abnormal		may have
				a value (abnormal		an effect on
				value)		an effect on
				value)		driveability
						driveability

FMI 4	•	Voltage below	•	Short circuit -,	•	MIL illuminated	• Engine Oil Temperature (EOT) sensor
		normal, or shorted		measuring line	•	(13L engine only)	•	failure
		to low source			•	Yellow electronic	•	Faulty harness
						malfunction lamp
						illuminated

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 5	•	Current below	•	Short circuit +,	•	MIL illuminated	•	Engine Oil Temperature (EOT) sensor
		normal or open	•	measuring line	•	(13L engine only)	•	failure
		circuit	•	Open circuit	•	Yellow electronic	•	Faulty harness
						malfunction lamp
						illuminated

FMI 13	•	Out of Calibration	•	Sensor out of	•	MIL illuminated	•	Engine Oil Temperature (EOT) sensor
			•	range				failure
			•	Sensor indicates a
				invalid value

FMI 16	• Data valid but above		•	Extreme driving	•	Yellow electronic	•	Extreme driving conditions
		normal operating	•	conditions		malfunction lamp	•	Engine cooling fan
		range - Moderately	•	Engine oil	•	illuminated	•	Oil thermostat
		severe level		temperature is	•	Engine derate	•	Coolant system
				moderately too			•	Coolant system
				high			•	Clogged oil cooler
FMI 17	• Data valid but below		•	Sensor out of	•	MIL illuminated	•	Engine Oil Temperature (EOT) sensor
		normal operating	•	range				failure
		range - Least severe	•	Sensor indicates a
		level		invalid value
				invalid value

ECM SPN 177, Transmission Oil Temperature – MID 128 PID 177

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Oil temperature	•	Red engine	•	Transmission oil cooler
		normal operational		critically above		shutdown lamp	•	Coolant system
		range - Most severe		range		illuminated
		level

FMI 16	• Data valid but above		•	Oil temperature	•	Yellow electronic	•	Extreme driving conditions
		normal operating		is moderately too		malfunction lamp	•	Engine cooling fan
		range - Moderately		high		illuminated	•	Oil thermostat
		severe level					•	Oil thermostat
							•	Coolant system
							•	Clogged oil cooler

ECM SPN 188, Engine Speed At Idle, Point 1 (Engine Configurations) – MID 128 PID 188

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:

FMI 0	• Data valid but above	• Engine idle speed	•	MIL illuminated	• Engine oil entering cylinders
	normal operational	above desired	•	High engine oil	• Leaking or faulty fuel injector
	range - Most severe	speed		consumption
	level		•	consumption
	level			High fuel
				High fuel
				consumption

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 1	• Data valid but below		•	Engine idle speed	•	MIL illuminated	• Low engine torque production
		normal operational		below desired	•	High fuel	•	Faulty fuel injector
		range - Most severe		speed		consumption	•	Low cylinder compression
		level				consumption
		level
							• Engine friction is too high
ECM SPN 190, Engine Speed – MID 128 PID 190

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Engine is/was	•	Red engine	• Engine oil entering cylinders
		normal operational		overspeeding		shutdown lamp	• Faulty crankcase oil filter
		range - Most severe				illuminated	•	Possible engine brake engaged
		level					•	Possible engine brake engaged
							•	causing engine overspeeding
							•	Possible transmission downshift
								causing engine overspeeding

ECM SPN 228, Speed Sensor Calibration – MID 128 PID 228

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 9	•	Abnormal update	•	SAE J1587 data	•	Wrong trip data	•	Vehicle ECU
		rate		link calibration
				factor message
				does not exist.
				(VECU error).

FMI 11	•	Failure mode not	•	SAE J1587 data	•	Wrong trip data	•	Vehicle ECU
		identifiable		link calibration
				factor message
				does not exist.
				(VECU error).

ECM SPN 237, Vehicle Identification Number – MID 128 PSID 161/162

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	No answer from	•	Yellow electronic	•	Data link error
		intermittent or		VIN		malfunction lamp	•	ECM
		incorrect			•	illuminated	• Missing VIN in other ECM’s (commonly
						Engine will not	• Missing VIN in other ECM’s (commonly
						Engine will not		VECU, LCM)
						start
FMI 12	•	Bad intelligent	•	Bad answer from	•	Yellow electronic	•	ECM
		device or		VIN		malfunction lamp	•	Mismatched VIN sent from other
		component			•	illuminated		ECM’s (commonly VECU, LCM)
						Engine will not		ECM’s (commonly VECU, LCM)
						Engine will not
						start

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 245, Total Vehicle Distance – MID 128 PID 245

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 9	•	Abnormal update	•	SAE J1587 data	•	N/A	•	Vehicle ECU
		rate		link total vehicle
				distance message
				does not exist.
				(VECU error).

ECM SPN 251, Time – MID 128 PID 251

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Time data	•	N/A	•	Instrument Cluster
		intermittent or		message missing
		incorrect		on SAE J1587 and
				J1939 data links.
			•	(Cluster error).
			•	Time stamp
				from cluster isn’t
				available.

FMI 9	•	Abnormal update	•	Time data	•	N/A	•	Instrument Cluster
		rate		message didn’t
				arrive when
				expected. (Cluster
			•	error).
			•	Time stamp
				from cluster isn’t
				available.

FMI 10	•	Abnormal rate of	•	Soak time too	•	MIL illuminated	•	Instrument Cluster
		change	•	long.	•	Engine makes
			•	Time data fault,		warm start but
				data deemed		cold start needed.
				inaccurate.

FMI 12	•	Bad intelligent	•	Time and date	•	MIL illuminated	•	Instrument Cluster
		device or		data missing on			•	Faulty harness
		component		J1939 data link.			•	Faulty harness connector
							•	Faulty harness connector
FMI 13	•	Out of calibration	•	Time/date fault	•	MIL illuminated	•	Instrument Cluster
						(13L engine only)	•	Faulty harness
							•	Faulty harness connector
FMI 19	•	Received network	•	Soaktime too long.	•	MIL illuminated	•	Instrument Cluster
		data in error	•	Time data fault,		(13L engine only)
				data deemed
				inaccurate.

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 252, Date – MID 128 PID 252

Type of	FMI Description:	Fault Condition:		Possible	Possible Cause:
fault:				Symptoms:

FMI 9	• Abnormal update	•	Time stamp	• N/A	• Instrument Cluster
	rate		from cluster isn’t
		•	available.
		•	Date data
			message missing
			on SAE J1587
			data link. (Cluster
			error).

ECM SPN 411, Engine Exhaust Gas Recirculation Differential Pressure – MID 128 PID 411

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Exhaust Gas	•	MIL illuminated	•	Faulty harness
		normal operational		Recirculation	•	Engine derate	•	Faulty harness connector
		range - Most severe		(EGR) differential			•	Faulty sensor
		level		pressure sensor			•	Faulty sensor
				output reading too			•	EGR leakage
				high. (abnormal			•	Clogged EGR cooler
				value)
FMI 1	• Data valid but below		•	Exhaust Gas	•	MIL illuminated	•	Faulty harness
		normal operational		Recirculation			•	Faulty harness connector
		range - Most severe		(EGR) differential			•	Faulty sensor
		level		pressure sensor			•	Faulty sensor
				output reading too			•	Clogged venturi
				low. (abnormal
				value)

FMI 2	•	Data erratic,	•	Only used to	•	N/A	•	N/A
		intermittent or		control EGR valve.
		incorrect

FMI 3	•	Voltage above	• Short to battery in		•	MIL illuminated	•	Faulty EGR differential pressure
		normal or shorted to	•	metering line	•	Engine derate	•	sensor connector
		high source	•	Open in the			•	Faulty EGR differential pressure
				ground circuit			•	sensor harness
							•	Faulty EGR differential pressure
								sensor

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 5	•	Current below	•	Open in the 5 volt	•	MIL illuminated	•	Faulty EGR differential pressure
		normal or open	•	supply line	•	Engine derate	•	sensor connector
		circuit	•	Short to ground in			•	Faulty EGR differential pressure
			•	metering line			•	sensor harness
			•	Open in the			•	Faulty EGR differential pressure
				metering line				sensor

FMI 7	•	Mechanical system	•	EGR differential	•	MIL illuminated	•	Faulty EGR differential pressure
		not responding or		pressure sensor	•	Engine derate	•	sensor connector
		out of adjustment		is read either to			•	Faulty EGR differential pressure
				high or too low.				sensor harness
				(Abnormal value).			•	sensor harness
				(Abnormal value).				Faulty EGR differential pressure
								Faulty EGR differential pressure
							•	sensor
							•	EGR valve
							•	EGR valve leak
							•	Clogged venturi

ECM SPN 412, Engine Exhaust Gas Recirculation Temperature – MID 128 PID 412

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Engine Exhaust	•	Engine derate	•	Extreme driving conditions
		normal operational		Gas Recirculation			•	EGR cooler failure
		range - Most severe		Temperature is
		level		above range

FMI 2	•	Data erratic,	•	EGR temperate	•	MIL illuminated	•	Faulty sensor
		intermittent or		signal, believed	•	Engine derate
		incorrect		to be not valid
				(plausibility fault)

FMI 4	•	Voltage below	•	Short to ground	•	MIL illuminated	•	Faulty EGR Temperature Sensor
		normal, or shorted		on the metering	•	Engine power	•	connector
		to low source		side of the EGR		will be derated	•	Faulty EGR Temperature Sensor
				Sensor circuit		according to the		harness
						error torque map	• Faulty EGR Temperature Sensor
FMI 5	•	Current below	•	Short to battery	•	MIL illuminated	•	Faulty EGR Temperature Sensor
		normal or open		in the metering	•	Engine derate	•	connector
		circuit		side of the EGR			•	Faulty EGR Temperature Sensor
			•	Sensor circuit				harness
				Open in the			•	harness
				Open in the			•	Faulty EGR Temperature Sensor
				metering side of
				the EGR Sensor
			•	circuit
			•	Open circuit in
				the ground line of
				the EGR Sensor
				circuit

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 13	•	Out of calibration	•	Engine Exhaust	•	MIL illuminated	•	Faulty EGR Temperature Sensor
				Gas Recirculation			•	connector
				Temperature			•	Faulty EGR Temperature Sensor
				sensor is out of				harness
				range (low)			•	harness
			•	range (low)				Faulty EGR Temperature Sensor
				Sensor indicates				Faulty EGR Temperature Sensor
				Sensor indicates
				a invalid value

FMI 13 )	•	Out of calibration	•	Engine Exhaust	•	Engine derate	•	Extreme driving conditions
				Gas Recirculation			•	EGR cooler failure
				Temperature
				sensor is above
				range

FMI 15	• Data valid but above		•	Engine Exhaust	•	MIL illuminated	•	Faulty EGR Temperature Sensor
		normal operating		Gas Recirculation			•	connector
		range - Least severe		Temperature			•	Faulty EGR Temperature Sensor
		level		sensor is out of				harness
				range (high)			•	harness
			•	range (high)				Faulty EGR Temperature Sensor
				Sensor indicates				Faulty EGR Temperature Sensor
				Sensor indicates
				a invalid value

FMI 16	• Data valid but above		•	Engine Exhaust	•	Engine derate	•	Extreme driving conditions
		normal operating		Gas Recirculation			•	EGR cooler failure
		range - Moderately		Temperature is
		severe level		above range

FMI 17	• Data valid but below		•	Engine Exhaust	•	MIL illuminated	•	Faulty EGR Temperature Sensor
		normal operating		Gas Recirculation			•	connector
		range - Least severe		Temperature is			•	Faulty EGR Temperature Sensor
		level	•	out of range (low)				harness
				Sensor indicates			•	harness
				Sensor indicates			•	Faulty EGR Temperature Sensor
				a invalid value
ECM SPN 558, Accelerator Pedal 1 Idle Validation Switch – MID 128 SID 230

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Idle Validation	•	Yellow electronic	•	Faulty harness or connector
		normal, or shorted		Switch (IVS)		malfunction lamp
		to high source		signal shorted		illuminated
				to voltage

FMI 5	•	Current below	•	Idle Validation	•	Yellow electronic	•	Faulty harness or connector
		normal or open		Switch (IVS)		malfunction lamp
		circuit		signal shorted		illuminated
				to ground or open

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 626, Intake Air Heater (IAH) Relay – MID 128 PID 45

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Short Circuit +,	•	Preheat relay not	• Preheat relay solenoid shorted
		normal, or shorted		Measuring line	•	activated
		to high source			•	White smoke for
					•	cold start
					•	Start problems in
						cold climate

FMI 4	•	Voltage below	•	Short Circuit -,	•	Red engine	•	Faulty harness
		normal, or shorted		Measuring line		shutdown lamp
		to low source				illuminated (13L
						engine CXU, CHU
					•	and GU only)
					•	Yellow electronic
						malfunction lamp
						illuminated
					• Induction air is hot
					•	Preheat relay is
						impossible to turn
						off

FMI 5	•	Current below	•	Open Circuit	•	Preheat relay not	•	Faulty Preheat relay
		normal or open			•	activated	•	Faulty harness
		circuit			•	White smoke for
					•	cold start
					•	Start problems in
						cold climate

ECM SPN 628, Program Memory – MID 128 SID 240

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Check sum error	•	Red engine	•	Engine Control Module (ECM)
		intermittent or				shutdown lamp		software
		incorrect			•	illuminated
					•	Engine will not
						start

FMI 11	•	Root cause not	•	Bad software	•	MIL illuminated	•	Engine Control Module (ECM)
		known		configuration	•	Engine will not		software
						start

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 12	•	Bad intelligent	•	Error on code-part	•	Red engine	•	Engine Control Module (ECM)
		device or		of flash RAM or		shutdown lamp	•	software
		component		erased vendor	•	illuminated	•	Engine Control Module (ECM)
				area	•	Nothing functions
FMI 14	•	Special instructions	• VIN not loaded yet		•	Flashing MIL	•	VIN missing
					•	Engine will not
						start
ECM SPN 629, Electronic Control Unit (ECU) 1 – MID 128 SID 254

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 8	•	Abnormal frequency	•	Self test failure	•	Red engine	•	Engine Control Module (ECM)
		or pulse width or				shutdown lamp
		period			•	illuminated
					•	Not possible to
						program Engine
						Control Module
						(ECM)

FMI 12	•	Bad intelligent	•	Self test failure	•	Red engine	•	Engine Control Module (ECM)
		device or				shutdown lamp
		component			•	illuminated
					•	Engine will not
						start

ECM SPN 630, Calibration Memory – MID 128 SID 253

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Check sum error	•	Red engine	•	Engine Control Module (ECM)
		intermittent or				shutdown lamp		software
		incorrect			•	illuminated
					•	Engine will not
						start

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 12	•	Bad intelligent	•	Check sum error	•	Red engine	•	Engine Control Module (ECM)
		device or				shutdown lamp
		component			•	illuminated
					•	Engine will not
						start

FMI 14	•	Special instructions	• VIN not loaded yet		•	Red engine	•	Engine Control Module (ECM)
						shutdown lamp		software
					•	illuminated
					•	Loss of log data
						and some user
						configurable data

ECM SPN 631, Calibration Module – MID 128 PSID 77/PSID 124

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Check sum error	•	Engine will not	•	Software error
		normal, or shorted				start
		to high source

FMI 8	•	Abnormal frequency	•	Reset of ECM	•	Engine will not	•	Software error
		or pulse width or		does not work		start
		period

ECM SPN 633, Engine Fuel Actuator 1 Control Command – MID 128 SID 18

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +	•	Yellow electronic	•	Faulty solenoid
		normal, or shorted				malfunction lamp	•	Faulty harness
		to high source			•	illuminated	•	Faulty ECM driver
						Valve constantly	•	Faulty ECM driver
						Valve constantly
						shut

FMI 4	•	Voltage below	•	Circuit shorted –	•	Yellow electronic	•	Faulty solenoid
		normal, or shorted				malfunction lamp	•	Faulty harness
		to low source			•	illuminated	•	Faulty ECM driver
						High fuel	•	Faulty ECM driver
						High fuel
						consumption due
						to fuel leakage

FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	•	Faulty solenoid
		normal or open				malfunction lamp	•	Faulty harness
		circuit			•	illuminated
					•	Valve constantly
						shut

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 636, Camshaft Position Sensor (CMP) – MID 128 SID 21

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Phase Error	•	MIL illuminated	•	Engine timing
		intermittent or		- Incorrect	•	Increase in fuel
		incorrect		correlation		consumption
				between CMP		consumption
				between CMP
				and crankshaft
				position (CKP)
				sensor

FMI 3	•	Voltage above	•	Missing Signal	•	MIL illuminated	•	Faulty harness
		normal, or shorted	•	from CMP sensor	•	Possible loss of
		to high source	•	Open in the CMP	•	engine power
				sensor circuit	•	Increased engine
			• Short to battery in			start time
				the CMP sensor
			•	circuit
			•	Short to ground in
				the CMP sensor
				circuit

FMI 8	•	Abnormal frequency	•	Noisy Signal from	•	MIL illuminated	•	Faulty CMP sensor
		or pulse width or	•	CMP sensor	•	Possible loss of	•	Faulty harness
		period	•	Open in the CMP	•	engine power
				sensor circuit	•	Increased engine
						start time

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 637, Crankshaft Position Sensor (CKP) – MID 128 SID 22

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Intermittent or	•	MIL illuminated	• Faulty CKP sensor harness
		intermittent or		weak signal	•	Yellow electronic	• Faulty CKP sensor
		incorrect				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Increased fuel
					•	consumption
					•	Imprecise engine
					•	timing
					•	Increased fuel
					•	consumption
					•	Uneven cylinder
					•	balancing
					•	Power loss
					•	Smoke
FMI 3	•	Voltage above	•	Missing Signal	•	MIL illuminated	• Faulty CKP sensor harness
		normal, or shorted	•	CKP sensor	•	Yellow electronic	• Faulty CKP sensor
		to high source	•	Open in the CKP		malfunction lamp
				sensor circuit	•	illuminated
			• Short to battery in		•	Possible loss of
				the CKP sensor	•	engine power
				circuit	•	Increased fuel
			• Short to ground in			consumption
				the CKP sensor
				circuit

FMI 8	•	Abnormal frequency	•	Erratic or	•	MIL illuminated	• Faulty CKP sensor harness
		or pulse width or		intermittent signal	•	Yellow electronic	• Faulty CKP sensor mounting
		period	•	from CKP sensor		malfunction lamp
						malfunction lamp
				Open in the CKP	•	illuminated
				sensor	•	Possible loss of
					•	engine power
					•	Increased engine
					•	start time
					•	Increased fuel
					•	consumption
					•	Uneven cylinder
					•	balancing
					•	Power loss
					•	Smoke

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 639, SAE J1939 Data Link 1 – MID 128 SID 231

Type of	FMI Description:	Fault Condition:	Possible	Possible Cause:
fault:			Symptoms:

FMI 2	• Data erratic,	• SAE J1939 high or	• MIL illuminated	• Faulty harness or connector
	intermittent or	low circuit shorted
	incorrect	+
		• SAE J1939 high or
		low circuit shorted
		–
		• SAE J1939 high
		or low circuit open

ECM SPN 641, Engine Variable Geometry Turbocharger (VGT) Actuator 1 – MID 128 SID 27

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Engine Variable	•	Possible Red	•	N/A
		normal operational		Geometry		engine shutdown
		range - Most severe		Turbocharger		lamp illuminated
		level		(VGT) actuator		(dependant on
				temperature out of	•	severity)
				range	•	Yellow electronic
						malfunction lamp
					•	illuminated
					•	Possible engine
						derate

FMI 2	•	Data erratic,	•	Engine Variable	•	MIL illuminated	•	Disturbance on CAN2 data link
		intermittent or		Geometry	•	Yellow electronic
		incorrect		Turbocharger		malfunction lamp
				(VGT) actuator		malfunction lamp
				(VGT) actuator		illuminated
				has not seen a	•	illuminated
				has not seen a		Low boost
				valid command on		Low boost
			•	CAN2 data link	•	Low power
			•	Incorrect data	•	Nozzle opens
					•	Smoke from
						engine
FMI 4	•	Voltage below	•	Short to ground	•	MIL illuminated	• Faulty VGT actuator connector
		normal, or shorted			•	Yellow electronic	•	Faulty VGT actuator harness
		to low source				malfunction lamp	•	Low battery voltage
						malfunction lamp	•	Low battery voltage
					•	illuminated
					•	Nozzle will open
						resulting in low
						power and low
					•	boost
					•	VGT actuator
						will continue
						to attempt and
						maintain target
						nozzle position

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 7	•	Mechanical system	•	Mechanical	•	MIL illuminated	•	VGT actuator motor effort is
		not responding or		problem with	•	Yellow electronic		temporarily limited to prevent
		out of adjustment		the Engine		malfunction lamp	•	overheating
				Variable Geometry		malfunction lamp		Restrictions detected when running
				Variable Geometry		illuminated		Restrictions detected when running
				Turbocharger	•	Low boost and		learn sequence
				(VGT) actuator			•	learn sequence
				(VGT) actuator				VGT actuator is slow to follow
					•	smoke		VGT actuator is slow to follow
					•	Possible engine	•	commands
					•	derate	•	VGT actuator position is not tracking
					•	Power loss in		command
						some cases when
						actuator motor
						has been disabled

FMI 9	•	Abnormal update	•	Data from the	•	MIL illuminated	•	Data link harness
		rate		Engine Variable	•	Yellow electronic	•	No supply to VGT actuator
				Geometry		malfunction lamp	•	VGT actuator
				Turbocharger		malfunction lamp	•	VGT actuator
				(VGT) actuator	•	illuminated	•	VGT actuator connector
				(VGT) actuator		Engine derated	•	VGT actuator connector
				has been missing		Engine derated
				for 2-seconds	•	(major)
				for 2-seconds		EGR valve closed
						EGR valve closed
FMI 13	•	Out of calibration	•	Failed self-	•	Yellow electronic	•	VGT actuator
				calibration		malfunction lamp
						illuminated

ECM SPN 642, Engine Variable Geometry Turbocharger (VGT) Actuator 2

– MID 128 PPID 89

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause
fault				Symptoms:

FMI 0	• Data valid but above	•	VGT SRA	•	Red engine	•	Coolant system malfunction
	normal operational		temperature is		shutdown lamp	•	Extreme driving conditions
	range - Most severe		critically high	•	illuminated	•	Overheated VGT actuator
	level				Engine derate	•	Overheated VGT actuator
	level				Engine derate
FMI 16	• Data valid but above	•	VGT SRA	•	Yellow electronic	•	Coolant system malfunction
	normal operating		temperature is		malfunction lamp	•	Extreme driving conditions
	range - Moderately		moderately too	•	illuminated	•	Overheated VGT actuator
	severe level		high		Engine derate	•	Overheated VGT actuator
	severe level		high		Engine derate
ECM SPN 647, Engine Fan Clutch Output Device Driver – MID 128 SID 33

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:
FMI 3	• Voltage above	•	Short to positive	•	Yellow electronic	• Faulty cooling fan actuator
	normal, or shorted		in the cooling fan		malfunction lamp	• Faulty cooling fan actuator harness or
	to high source		control circuit	•	illuminated		connector
					Increased fuel		connector
					Increased fuel
				•	consumption
				•	Fan runs at full
					speed

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 4	•	Voltage below	•	Short to ground	•	Yellow electronic	•	Faulty cooling fan actuator
		normal, or shorted		in the cooling fan		malfunction lamp	•	Faulty cooling fan actuator harness or
		to low source	•	control circuit	•	illuminated		connector
				Output voltage		Fan always		connector
				Output voltage		Fan always
				is 1/3 the supply		deactivated or
				voltage		always activated if
						fault is intermittent

FMI 5	•	Current below	•	Open in the	•	Increased fuel	•	Faulty cooling fan actuator
		normal or open		cooling fan control	•	consumption	•	Faulty cooling fan actuator harness or
		circuit		circuit	•	Fan runs at full		connector
						speed

ECM SPN 651, Engine Injector Cylinder 1 – MID 128 SID 1

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Harness shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted		low side circuit	•	Yellow electronic
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 5	•	Current below	•	Harness shorted	•	MIL illuminated	•	Faulty harness
		normal or open		+, – or open high	•	Yellow electronic	•	Faulty engine fuel injector
		circuit	•	side circuit		malfunction lamp
						malfunction lamp
				Harness shorted –	•	illuminated
				low side circuit	•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 7	•	Mechanical system	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
		not responding		data above limit			• Faulty engine fuel injector
		properly					•	Low cylinder compression
							•	Low cylinder compression
							•	Damaged or flywheel
FMI 8	•	Abnormal frequency,	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
		pulse width, or			•	Rough engine idle		clogged)
		period
FMI 13	•	Out of calibration	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
				data above limit			• Faulty engine fuel injector
							•	Low cylinder compression
							•	Damaged or flywheel
FMI 31	•	Condition exists	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
					•	Rough engine idle		clogged)

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 652, Engine Injector Cylinder 2 – MID 128 SID 2

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Harness shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted		low side circuit	•	Yellow electronic
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 5	•	Current below	•	Harness shorted	•	MIL illuminated	•	Faulty harness
		normal or open		+, – or open high	•	Yellow electronic	• Faulty engine fuel injector
		circuit	•	side circuit		malfunction lamp
				Harness shorted –		malfunction lamp
				Harness shorted –	•	illuminated
				low side circuit	•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 7	•	Mechanical system	•	Cylinder balancing	•	MIL illuminated	• PTO engaged without ECM knowing
		not responding		data above limit	•	Yellow electronic	• Faulty engine fuel injector
		properly				malfunction lamp	•	Low cylinder compression
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 8	•	Abnormal frequency,	•	Misfire detected	•	MIL illuminated	• Faulty engine fuel injector (possibly
		pulse width, or			•	Rough engine idle		clogged)
		period
FMI 13	•	Out of calibration	•	Cylinder balancing	•	MIL illuminated	• PTO engaged without ECM knowing
				data above limit	•	Yellow electronic	• Faulty engine fuel injector
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 31	•	Condition exists	•	Misfire detected	•	MIL illuminated	• Faulty engine fuel injector (possibly
					•	Rough engine idle		clogged)
ECM SPN 653, Engine Injector Cylinder 3 – MID 128 SID 3

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Harness shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted		low side circuit	•	Yellow electronic
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Engine power loss
					•	Engine running
						uneven (misfire)

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 5	•	Current below	•	Harness shorted	•	MIL illuminated	•	Faulty harness
		normal or open		+, – or open high	•	Yellow electronic	•	Faulty engine fuel injector
		circuit	•	side circuit		malfunction lamp
				Harness shorted –		malfunction lamp
				Harness shorted –	•	illuminated
				low side circuit	•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 7	•	Mechanical system	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
		not responding		data above limit	•	Yellow electronic	•	Faulty engine fuel injector
		properly				malfunction lamp	•	Low cylinder compression
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 8	•	Abnormal frequency,	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
		pulse width, or			•	Rough engine idle		clogged)
		period
FMI 13	•	Out of calibration	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
				data above limit	•	Yellow electronic	•	Faulty engine fuel injector
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 31	•	Condition exists	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
					•	Rough engine idle		clogged)
ECM SPN 654, Engine Injector Cylinder 4 – MID 128 SID 4

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Harness shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted		low side circuit	•	Yellow electronic
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 5	•	Current below	•	Harness shorted	•	MIL illuminated	•	Faulty harness
		normal or open		+, – or open high	•	Yellow electronic	•	Faulty engine fuel injector
		circuit	•	side circuit		malfunction lamp
						malfunction lamp
				Harness shorted –	•	illuminated
				low side circuit	•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 7	•	Mechanical system	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
		not responding		data above limit	•	Yellow electronic	•	Faulty engine fuel injector
		properly				malfunction lamp	•	Low cylinder compression
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 8	•	Abnormal frequency,	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
		pulse width, or			•	Rough engine idle		clogged)
		period
FMI 13	•	Out of calibration	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
				data above limit	•	Yellow electronic	•	Faulty engine fuel injector
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 31	•	Condition exists	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
					•	Rough engine idle		clogged)
ECM SPN 655, Engine Injector Cylinder 5 – MID 128 SID 5

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Harness shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted		low side circuit	•	Yellow electronic
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 5	•	Current below	•	Harness shorted	•	MIL illuminated	•	Faulty harness
		normal or open		+, – or open high	•	Yellow electronic	•	Faulty engine fuel injector
		circuit	•	side circuit		malfunction lamp
						malfunction lamp
				Harness shorted –	•	illuminated
				low side circuit	•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 7	•	Mechanical system	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
		not responding		data above limit	•	Yellow electronic	•	Faulty engine fuel injector
		properly				malfunction lamp	•	Low cylinder compression
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 8	•	Abnormal frequency,	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
		pulse width, or			•	Rough engine idle		clogged)
		period
FMI 13	•	Out of calibration	•	Cylinder balancing	•	MIL illuminated	•	PTO engaged without ECM knowing
				data above limit	•	Yellow electronic	•	Faulty engine fuel injector
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 31	•	Condition exists	•	Misfire detected	•	MIL illuminated	•	Faulty engine fuel injector (possibly
					•	Rough engine idle		clogged)

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 656, Engine Injector Cylinder 6 – MID 128 SID 6

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Harness shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted		low side circuit	•	Yellow electronic
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 5	•	Current below	•	Harness shorted	•	MIL illuminated	•	Faulty harness
		normal or open		+, – or open high	•	Yellow electronic	• Faulty engine fuel injector
		circuit	•	side circuit		malfunction lamp
				Harness shorted –		malfunction lamp
				Harness shorted –	•	illuminated
				low side circuit	•	Engine power loss
					•	Engine running
						uneven (misfire)
FMI 7	•	Mechanical system	•	Cylinder balancing	•	MIL illuminated	• PTO engaged without ECM knowing
		not responding		data above limit	•	Yellow electronic	• Faulty engine fuel injector
		properly				malfunction lamp	•	Low cylinder compression
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 8	•	Abnormal frequency,	•	Misfire detected	•	MIL illuminated	• Faulty engine fuel injector (possibly
		pulse width, or			•	Rough engine idle		clogged)
		period
FMI 13	•	Out of calibration	•	Cylinder balancing	•	MIL illuminated	• PTO engaged without ECM knowing
				data above limit	•	Yellow electronic	• Faulty engine fuel injector
						malfunction lamp	•	Low cylinder compression
						illuminated	•	Damaged or flywheel
							•	Damaged or flywheel
FMI 31	•	Condition exists	•	Misfire detected	•	MIL illuminated	• Faulty engine fuel injector (possibly
					•	Rough engine idle		clogged)
ECM SPN 677, Engine Starter Motor Relay – MID 128 SID 39

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +	•	Yellow electronic	•	Faulty starter relay
		normal, or shorted				malfunction lamp	•	Fault harness
		to high source			•	illuminated
					•	Engine will not
						start

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	•	Faulty starter relay
		normal or open				malfunction lamp	•	Fault harness
		circuit			•	illuminated
					•	Engine will not
						start

ECM SPN 729, Intake Air Heater (IAH) 1 – MID 128 SID 70

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +,	•	Yellow electronic	•	Faulty preheat relay
		normal, or shorted		measuring line		malfunction lamp	• Faulty intake air heater (IAH) 1
		to high source				illuminated
FMI 4	•	Voltage below	•	Circuit shorted –,	•	Yellow electronic	•	Faulty preheat relay
		normal, or shorted		measuring line		malfunction lamp	• Faulty intake air heater (IAH) 1
		to low source				illuminated

FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	• Faulty intake air heater (IAH) 1
		normal or open				malfunction lamp
		circuit				illuminated

ECM SPN 730, Intake Air Heater (IAH) 2 – MID 128 SID 71

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +,	•	Yellow electronic	•	Faulty preheat relay
		normal, or shorted		measuring line		malfunction lamp	• Fautly intake air heater (IAH) 2
		to high source				illuminated
FMI 4	•	Voltage below	•	Circuit shorted –,	•	Yellow electronic	•	Faulty preheat relay
		normal, or shorted		measuring line		malfunction lamp	• Fautly intake air heater (IAH) 2
		to low source				illuminated

Group 28			Engine Control Module (ECM) Diagnostic Trouble
Group 28				Codes (DTCs)
				Codes (DTCs)

FMI 5	• Current below	• Open circuit	• Yellow electronic	• Fautly intake air heater (IAH) 2
	normal or open		malfunction lamp
	circuit		illuminated

ECM SPN 975, Estimated Percent Fan Speed – (MID 128 PID 26)

Type of	FMI Description:	Fault Condition:		Possible	Possible Cause:
fault:				Symptoms:

FMI 3	• Voltage above	•	Missing signal	• Higher fuel	•	Cooling Fan Speed (CFS) sensor
	normal, or shorted		from Fan Speed	consumption	•	failure
	to high source	•	Sensor	• Will work as on/off	•	Faulty Cooling Fan Speed (CFS)
		•	Short Circuit +,	fan, 100%fan		sensor harness
		•	Measuring line	speed if cooling is
		•	Short Circuit -,	needed
		•	Measuring line
		•	Open Circuit,
		•	Measuring line
		•	Open Circuit,
			Ground line

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 1072, Engine Compression Brake Output #1 – MID 128 PPID 122

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause
fault					Symptoms:

FMI 1	• Data valid but below		•	Below range	•	No Engine	•	Low engine oil temperature
		normal operational				Compression
		range - Most severe				Brake
		level

FMI 3	•	Voltage above	•	Short Circuit +	•	Yellow electronic	•	Faulty Engine Compression Brake
		normal, or shorted				malfunction lamp	•	actuator
		to high source			•	illuminated	•	Faulty harness
					•	Engine
						Compression
						Brake can not
					•	be turned on
					•	Engine brake
					•	function derated
					•	Gear shift
						performance
						derated for
						some automatic
						transmissions

FMI 4	•	Voltage below	•	Short Circuit -	•	Yellow electronic	•	Faulty Engine Compression Brake
		normal, or shorted				malfunction lamp	•	actuator
		to low source			•	illuminated	•	Faulty harness
					•	Compression
						brake can not
					•	be turned off
					•	Engine stops
					•	running
					•	Engine impossible
						to restart

FMI 5	•	Current below	•	Open Circuit	•	Yellow electronic	•	Faulty Engine Compression Brake
		normal or open				malfunction lamp	•	actuator
		circuit			•	illuminated	•	Faulty harness
					•	Compression rake
						can not be turned
					•	on
					•	Engine brake
					•	function derated
					•	Gear shift
						performance
						derated for
						some automatic
						transmission
						boxes

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 1127, Engine Turbocharger Intake Manifold Pressure (IMP) – MID 128 PSID 98

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Engine	•	MIL illuminated	•	EGR system failure
		normal operational		Turbocharger	•	(13L engine only)	•	Faulty Turbocharger oulet pressure
		range		boost pressure	•	Turbocharger		sensor
				is too high		surge
						surge

FMI 1	• Data valid but below		•	Engine	•	MIL illuminated	•	Air leak in turbocharger hoses, pipes,
		normal operational		Turbocharger	•	(13L engine only)	•	brackets, cooler or components
		range		boost pressure	•	Engine derate	•	EGR system fault
				is too low	•	Engine slow to
					•	Engine slow to
						respond

FMI 10	•	Abnormal rate of	•	Poor Engine	•	MIL illuminated	•	Turbocharger inlet air system leak
		change		Turbocharger	•	Engine power	•	Faulty Turbocharger
				boost pressure		loss/re-
				response		loss/re-
				response		sponse/drivability
						sponse/drivability

FMI 11	•	Root cause not	•	Variable Geometry	•	MIL illuminated	•	Variable Geometry Turbocharger fault
		known		Turbocharger
				control mode fault

FMI 13	•	Out of calibration	•	Variable Geometry	•	Engine power	•	Air leak in turbocharger hoses, pipes,
				Turbocharger		loss/re-	•	brackets, cooler or components
				control mode		sponse/drivability	•	EGR system fault
				adjustment			•	Faulty Turbocharger oulet pressure
				exceeded			•	Faulty Turbocharger oulet pressure
							•	sensor
							•	Exhaust back pressure too high
FMI 14	•	Special instructions	•	Poor Engine	•	MIL illuminated	•	Air leak in turbocharger hoses, pipes,
				Turbocharger				brackets, cooler or components
				boost pressure			• Variable Geometry Turbocharger fault
				response			•	Oil pressure fault
							•	Oil pressure fault
FMI 16	• Data valid but above		•	Engine	•	MIL illuminated	•	EGR system failure
		normal operating		Turbocharger	•	(13L engine only)	•	Faulty sensor
		range - Moderately		boost pressure	•	Turbocharger
		severe level		is too high		surge
						surge

FMI 18	• Data valid but below		•	Engine	•	MIL illuminated	•	Air leak in turbocharger hoses, pipes,
		normal operating		Turbocharger	•	(13L engine only)	•	brackets, cooler or components
		range - Moderately		boost pressure	•	Engine derate	•	EGR system failure
		severe level		is too low	•	Engine slow to
					•	Engine slow to
						respond

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 1136, Engine Control Module (ECM) Temperature – MID 128 PPID 55

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause
fault					Symptoms:

FMI 4	•	Voltage below	•	Short to ground	•	N/A	•	Engine Control Module (ECM)
		normal, or shorted		on the metering
		to low source		circuit

FMI 5	•	Current below	•	Short to battery	•	N/A	•	Engine Control Module (ECM)
		normal or open		in the metering
		circuit	•	circuit
			•	Open in the
				metering circuit
			• Open circuit in the
				ground circuit
ECM SPN 1198, Anti–theft Random Number – MID 128 PID 224

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Engine Control	•	Yellow electronic	•	Security system failure
		intermittent or		Module and		malfunction lamp
		incorrect		Instrument Control	•	illuminated
				Module security	•	Can start engine
				codes do not
				match

FMI 12	•	Bad intelligent	•	Security system	•	Yellow electronic	•	Security system failure
		device or		not installed		malfunction lamp
		component			•	illuminated
					•	Can start engine

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 1231, SAE J1939 Data Link 2 – MID 128 PSID 229/232

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		intermittent or	•	Circuit shorted –	•	Engine power loss
		incorrect	•	Open circuit	•	No Aftertreatment
			•	Open circuit	•	No Aftertreatment
						Diesel Exhaust
						Fluid (DEF)
					•	dosing
					•	No variable
						geometry engine
						turbocharger
						control

FMI 9	•	Abnormal update	•	Missing signal	•	MIL illuminated	• SAE J1939 data link
		rate		from Transmission	•	Yellow electronic	•	Faulty harness or connectors
				Control Module		malfunction lamp	•	DEF pump
				(TCM)		malfunction lamp	•	DEF pump
					•	illuminated	•	Aftertreatment Diesel Exhaust Fluid
						No Aftertreatment	•	Aftertreatment Diesel Exhaust Fluid
						No Aftertreatment		(DEF) control module
						Diesel Exhaust
						Fluid (DEF)
						dosing

ECM SPN 1265, Engine Piston Cooling Oil Pressure Actuator – MID 128 SID 85

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted +	•	Yellow electronic	•	Faulty harness
		normal, or shorted				malfunction lamp	•	Faulty actuator
		to high source			•	illuminated
					•	Possible smoke
						during start up

FMI 4	•	Voltage below	•	Circuit shorted –	•	Red engine	•	Faulty harness
		normal, or shorted				shutdown lamp	•	Faulty actuator
		to low source			•	illuminated
					•	Engine damage
						can occur without
						piston cooling

FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	•	Faulty harness
		normal or open				malfunction lamp	•	Faulty actuator
		circuit			•	illuminated
					•	Possible smoke
						during start up

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 1322, Engine Misfire for Multiple Cylinders – MID 128 PSID 27

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 8	•	Abnormal frequency	•	Cylinder misfires	•	MIL illuminated	•	Engine fuel injectors
		or pulse width or		detected in	•	Rough idle
		period		multiple cylinders
FMI 31	•	Condition exists	•	Cylinder misfires	•	MIL illuminated	•	Engine fuel injectors
				detected in	•	Rough idle
				multiple cylinders
ECM SPN 1659, Engine Coolant System Thermostat – MID 128 PSID 109

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 7	•	Mechanical system	•	Thermostat stuck	•	Possible poor	•	Coolant thermostat
		not responding or		closed		drivability
		out of adjustment

FMI 12	•	Bad intelligent	•	Thermostat is	•	MIL illuminated	•	Coolant thermostat
		device or		leaking or stuck	•	Longer engine
		component		open		warm up time
					•	warm up time
					•	Poor heat in cab
ECM SPN 1675, Engine Starter Mode – MID 128 SID 39

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Starter	•	Engine will not	•	Starter is deactivated due to
		normal operational		overheating		start		overheating
		range - Most severe
		level

FMI 7	•	Mechanical system	•	Transmission not	•	Engine will not	•	Starter is deactivated due to
		not responding or		in neutral		start		overheating
		out of adjustment

FMI 10	•	Abnormal rate of	•	Starter gear is	•	Engine will not	•	Starter is deactivated due to
		change		stuck, engaged		start		overheating
				with engine

FMI 14	•	Special instructions	•	PTO is engaged	•	Engine will not	•	Starter is deactivated due to
				or switch on		start		overheating

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 1677, Aftertreatment DPF Auxiliary Heater Mode – MID 128 PSID 25

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 0	• Data valid but above	•	Truck has idled	•	Red engine	•	Extremely cold ambient temperatures
	normal operational		too long without		shutdown lamp	•	PTO operated with limited exhaust
	range — most		completing a	•	illuminated		temperatures
	severe level		periodic heat		Engine derate	•	temperatures
	severe level		periodic heat				Engine turbocharger
			mode				Engine turbocharger
				•	High temperature	•	Engine turbocharger compressor
					spikes in DPF		bypass valve
					when driving		bypass valve
					when driving
					is resumed or
					during stationary
					regeneration

FMI 7	• Mechanical system	•	Truck has idled	•	Yellow electronic	•	Extremely cold ambient temperatures
	not responding or		too long without		malfunction lamp	•	PTO operated with limited exhaust
	out of adjustment		completing a	•	illuminated		temperatures
			periodic heat		White exhaust	•	temperatures
			periodic heat				Engine turbocharger
			mode				Engine turbocharger
				•	smoke	•	Engine turbocharger compressor
					High temperature	•	Engine turbocharger compressor
					High temperature		bypass valve
					spikes in DPF
					when driving
					is resumed or
					during stationary
					regeneration

FMI 16	• Data valid but above	•	Truck has idled	•	Yellow electronic	•	Extremely cold ambient temperatures
	normal operating		too long without		malfunction lamp	•	PTO operated with limited exhaust
	range - Moderately		completing a	•	illuminated		temperatures
	severe level		periodic heat		White exhaust	•	temperatures
	severe level		periodic heat				Engine turbocharger
			mode				Engine turbocharger
				•	smoke	•	Engine turbocharger compressor
					High temperature	•	Engine turbocharger compressor
					High temperature		bypass valve
					spikes in DPF
					when driving
					is resumed or
					during stationary
					regeneration

ECM SPN 1761, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Level – PPID 278

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Short circuit high	•	N/A	•	DEF tank pickup assembly/sensor
		normal, or shorted		side				failure
		to high source

FMI 5	•	Current below	•	Short circuit +	•	Yellow electronic	•	DEF tank pickup assembly/sensor
		normal or open	•	Open circuit		malfunction lamp		failure
		circuit				illuminated

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 11	•	Root cause not	• DEF tank level low		•	Low DEF fluid	•	N/A
		known		(driver warning)		lamp illuminated
FMI 14	•	Special Instructions	•	DEF tank almost	•	Low DEF fluid	•	N/A
				empty (driver	•	lamp illuminated
				warning)	•	No Aftertreatment
						Diesel Exhaust
						Fluid (DEF)
						dosing

FMI 18	• Data valid but below		•	DEF tank almost	•	Low DEF fluid	•	N/A
		normal operating		empty (driver	•	lamp illuminated
		range - Moderately		warning)	•	No Aftertreatment
		severe level				Diesel Exhaust
						Diesel Exhaust
						Fluid (DEF)
						dosing

ECM SPN 2003, Transmission Control Module (TCM) Status – MID 128 PSID 205

Type of	FMI Description:	Fault Condition:		Possible	Possible Cause:
fault:				Symptoms:

FMI 9	• Abnormal update	•	Missing signal	• N/A	• Data link error
	rate		from Transmission
			Control Module
			(TCM)

ECM SPN 2017, Cruise Control Status – MID 128 PID 85

Type of	FMI Description:	Fault Condition:		Possible	Possible Cause:
fault:				Symptoms:
FMI 9	• Abnormal update	•	Missing (Cruise	• Cruise Control	• No clutch information to Engine Control
	rate		Control) signal	does not work	Module (ECM) from SAE J1939 data
			from VECU		link

ECM SPN 2029, Invalid or Missing Data from Vehicle ECU – MID 128 PSID 201

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 8	•	Abnormal frequency	•	No contact with	•	Yellow electronic	•	Faulty harness
		or pulse width or		VECU		malfunction lamp
		period			•	illuminated
					•	PTO, engine
						compression
						brake and cruise
						control do not
						work

FMI 9	•	Abnormal update	•	Missing signal	•	MIL illuminated	•	Faulty harness
		rate		from cluster		(13L engine only)

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 2629, Engine Turbocharger Compressor Outlet Temperature – MID 128 PID 404

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Estimated engine	•	Engine derate	•	High ambient temperature
		normal operational		turbocharger			•	Low barometric pressure
		range - Most severe		discharge			• Leak in engine turbocharger inlet tube
		level		temperature error.			• Leak in engine turbocharger inlet tube

FMI 2	•	Data erratic,	•	Engine	•	Engine derate	• Engine turbocharger outlet temperature
		intermittent or		turbocharger	•	MIL illuminated		sensor
		incorrect		outlet temperature
				signal believed to
				be not valid (high)
				(plausibility fault)

FMI 4	•	Voltage below	•	Short circuit -,	•	MIL illuminated	•	Faulty sensor
		normal, or shorted		measuring line	•	Yellow electronic	•	Faulty harness
		to low source				malfunction lamp
						malfunction lamp
						illuminated

FMI 5	•	Current below	•	Short circuit +,	•	MIL illuminated	•	Faulty sensor
		normal or open	•	measuring line	•	Yellow electronic	•	Faulty harness
		circuit	•	Open circuit		malfunction lamp
						illuminated

FMI 13	•	Out of calibration	•	Sensor out of	•	MIL illuminated	•	Faulty sensor
				range
FMI 15	• Data valid but above		•	Sensor out of	•	MIL illuminated	•	Faulty sensor
		normal operating		range
		range - Least severe
		level

FMI 17	• Data valid but below		•	Sensor out of	•	MIL illuminated	•	Faulty sensor
		normal operating		range
		range - Least severe
		level

ECM SPN 2659, Engine Exhaust Gas Recirculation (EGR) Mass Flow Rate

– MID 128 PPID 35

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:
FMI 0	• Data valid but above	• EGR flow is too	•	MIL illuminated	• Faulty EGR system
	normal operational	high	•	Exhaust smoke
	range

Group 28					Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 1	• Data valid but below	•	EGR flow is too	•	MIL illuminated	•	Faulty EGR system
	normal operational		low			•	Clogged EGR cooler
	range
FMI 16	• Data valid but above	•	EGR flow is too	•	MIL illuminated	•	Faulty EGR system
	normal operating		high	•	Exhaust smoke	•	Faulty harness or connector
	range - Moderately
	severe level

FMI 18	• Data valid but below	•	EGR flow is too	•	MIL illuminated	•	Faulty EGR system
	normal operating		low			•	Clogged EGR cooler
	range - Moderately					•	Faulty harness or connector
	severe level					•	Faulty harness or connector

ECM SPN 2791, Engine Exhaust Gas Recirculation (EGR) Valve Control – MID 128 SID 146

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Stuck EGR valve	•	MIL illuminated	•	Faulty harness or connector
		normal, or shorted	•	EGR valve circuit	•	Engine derate	•	Faulty EGR valve
		to high source		shorted +
			•	shorted +
			•	EGR valve circuit
				shorted to –

FMI 5	•	Current below	•	Open EGR valve	•	MIL illuminated	•	Faulty harness or connector
		normal or open		circuit	•	Engine derate	•	Faulty EGR valve
		circuit
ECM SPN 2836, Battery Potential/Switched Voltage – MID 128 PSID 49

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Battery voltage	•	N/A	•	Faulty cab or chassis harness
		normal, or shorted		too high			•	Charging system fault
		to high source					•	External charger
							•	External charger
FMI 4	•	Voltage below	•	Battery voltage	•	Starter will not	•	Faulty cab or chassis harness
		normal, or shorted		too low		crank	•	Charging system fault
		to low source					•	Battery
							•	Battery
							•	Fuse

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3031, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Temperature – MID 128 PPID 274

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Aftertreatment	•	MIL illuminated	•	DEF tank pickup assembly/sensor
		normal operational		Diesel Exhaust	•	No Aftertreatment		failure
		range - Most severe		Fluid (DEF) tank		Diesel Exhaust
		level		temperature too		Diesel Exhaust
		level		temperature too		Fluid (DEF)
				high		Fluid (DEF)
			•	high		dosing
				Date data		dosing
				Date data
				message missing
				on SAE J1587
				data link. (Cluster
				error).

FMI 4	•	Voltage below	•	Short Circuit -	•	MIL illuminated	•	DEF tank pickup assembly/sensor
		normal, or shorted					•	failure
		to low source					•	DEF tank pickup asssembly/sensor
								wiring or connectors

FMI 5	•	Current below	•	Short Circuit +	•	MIL illuminated	•	DEF tank pickup assembly/sensor
		normal or open	•	Open Circuit			•	failure
		circuit					•	DEF tank pickup assembly/sensor
								wiring or connectors

FMI 8	•	Abnormal frequency	•	Sensor ripple is	•	N/A	•	DEF tank pickup assembly/sensor
		or pulse width or		not too high			•	failure
		period					•	DEF tank pickup ‘assembly/sensor
								wiring or connectors

ECM SPN 3064, Aftertreatment DPF System Monitor – MID 128 PPID 326

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Moderately high	•	Yellow electronic	•	Diesel Particulate Filter (DPF) clogged
		normal operational		soot load		malfunction lamp	•	After Treatment Fuel Injector clogged
		range - Most severe			•	illuminated	•	Regeneration disabled by driver or
		level				Medium to high	•	Regeneration disabled by driver or
						Medium to high		other component
						engine derate
FMI 10	•	Abnormal rate of	•	Soot loading high	•	Yellow electronic	•	No error, condition occurs during heavy
		change		due to heavy		malfunction lamp		load or use with high soot loading
				load or use (no	•	illuminated
				problem)	•	Engine derate
FMI 11	•	Root cause not	•	Critically high soot	•	Red engine	•	Diesel Particulate Filter (DPF) clogged
		known		load		shutdown lamp	•	Aftertreatment hydrocarbon doser
					•	illuminated		(injector)
						High engine	•	(injector)
						High engine	•	Regeneration disabled by driver or
					•	derate		other component
						Engine derate		other component
						Engine derate

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3216, Aftertreatment Intake NOx – MID 128 PPID 348

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Inlet NOx sensor	•	MIL illuminated	•	Engine out NOx high
		intermittent or		error (plausibility)			•	Faulty NOx sensor
		incorrect
FMI 3	•	Voltage above	•	Short Circuit, NOx	•	MIL illuminated	•	Faulty wiring between NOx sensor and
		normal, or shorted		signal			•	NOx sensor ECU
		to high source					•	Faulty NOx sensor
FMI 5	•	Current below	•	Open Circuit, NOx	•	MIL illuminated	•	Faulty wiring between NOx sensor and
		normal or open		signal			•	NOx sensor ECU
		circuit					•	Faulty NOx sensor
FMI 9	•	Abnormal update	•	Missing signal	•	MIL illuminated	•	Loss of communication from NOx
		rate		from NOx sensor	•	Yellow electronic		sensor ECU and Engine Control
						malfunction lamp		Module (ECM)
						malfunction lamp
						illuminated

FMI 11	•	Root cause not	•	NOx sensor	•	MIL illuminated	•	Faulty NOx sensor
		known		measures near
				zero for long time
				with high load

FMI 12	•	Bad intelligent	•	NOx-sensor signal	•	MIL illuminated	•	Faulty NOx sensor
		device or		corrupt (incorrect
		component		value)

FMI 13	•	Out of calibration	•	NOx-sensor	•	MIL illuminated	•	Faulty NOx sensor
				activation
				(incorrect value)

FMI 14	•	Special instructions	•	Missing signal	•	MIL illuminated	•	Voltage to NOx sensor is too high or
				from sensor due			•	too low
				to battery voltage			•	Faulty harness to sensor

ECM SPN 3226, Aftertreatment Outlet NOx – MID 128 PPID 270/ PSID 90

MID 233 Fault code sent by MID 128 Engine control unit

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause
fault					Symptoms:

FMI 2	•	Data erratic,	•	Inlet NOx sensor	•	MIL illuminated	•	Engine out NOx high
		intermittent or	•	error (plausibility)			•	Faulty NOx sensor
		incorrect		Mismatch between			•	Aftertreatment Diesel Exhaust Fluid
				Mismatch between			•	Aftertreatment Diesel Exhaust Fluid
				sensors				(DEF) quality
								(DEF) quality

FMI 3	•	Voltage above	•	Short Circuit, NOx	•	MIL illuminated	•	Faulty wiring between NOx sensor and
		normal or shorted		signal			•	NOx sensor ECU
		to high source					•	Faulty NOx sensor
FMI 5	•	Current below	•	Open Circuit, NOx	•	MIL illuminated	•	Faulty wiring between NOx sensor and
		normal or open		signal			•	NOx sensor ECU
		circuit					•	Faulty NOx sensor

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

MID 233 Fault code sent by MID 128 Engine control unit (cont’d.)

FMI 9	•	Abnormal update	•	Missing signal	•	MIL illuminated	•	Loss of communication from NOx
		rate		from NOx sensor	•	Yellow electronic		sensor ECU and Engine Control
						malfunction lamp		Module (ECM)
						malfunction lamp
						illuminated

FMI 11	•	Root cause not	•	NOx sensor	•	MIL illuminated	•	Faulty NOx sensor
		known		measures near
				zero for long time
				with high load

FMI 12	•	Bad intelligent	•	NOx-sensor signal	•	MIL illuminated	•	Faulty NOx sensor
		device or		corrupt (incorrect
		component		value)

FMI 13	•	Out of calibration	•	NOx-sensor	•	MIL illuminated	•	Faulty NOx sensor
				activation
				(incorrect value)

FMI 14	•	Special instructions	•	Missing signal	•	MIL illuminated	• Voltage to NOx sensor is too high or
				from sensor due to				too low
				battery voltage			• Faulty harness to sensor
FMI 31	•	Condition exists	•	Inlet NOx sensor	•	MIL illuminated	• Engine out NOx high
			•	error			•	Faulty NOx sensor
			•	Mismatch between			•	Aftertreatment Diesel Exhaust Fluid
				sensors				(DEF) quality
								(DEF) quality

ECM SPN 3245, Aftertreatment DPF Outlet Temperature – MID 128 PPID 436

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Temperature	•	Low engine power	•	Restricted Catalyst
		normal operational		critically too high			•	Intake air leak
		range - Most severe					•	Faulty sensor
		level					•	Faulty sensor

FMI 2	•	Data erratic,	•	Sensor is	•	MIL illuminated	•	Faulty sensor
		intermittent or		not rational	•	Regeneration not	•	Exhaust system leak
		incorrect		(plausibility)		possible	•	Faulty harness connectors or
						possible	•	Faulty harness connectors or
								connections

FMI 4	•	Voltage below	• Short to ground on		•	MIL illuminated	•	Faulty harness
		normal, or shorted		the metering side	•	Regeneration not	•	Faulty sensor
		to low source		of the circuit		possible	• Aftertreatment control module (ACM)
						possible	• Aftertreatment control module (ACM)

Group 28					Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 5	• Current below	•	Short to battery on	•	MIL illuminated	•	Faulty harness
	normal or open		the metering side			•	Faulty sensor
	circuit	•	of the circuit			• Aftertreatment control module (ACM)
			Open in the			• Aftertreatment control module (ACM)
			Open in the
			metering side of
		•	the circuit
		•	Open in the
			ground side of
			the circuit

FMI 15	• Data valid but above	•	Temperature	•	MIL illuminated	•	Faulty harness
	normal operating		sensor is out of			•	Faulty sensor
	range - Least severe	•	range (high)
	level	•	Sensor indicates a
			invalid value

ECM SPN 3249, Aftertreatment DPF Intake Temperature – MID 128 PPID 387

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Sensor is	•	MIL illuminated	•	Faulty harness
		intermittent or		not rational	•	Aborted	•	Faulty harness connectors or
		incorrect		(plausibility)		regeneration		connections
						regeneration	•	connections
							•	Exhaust system leak
							•	Faulty sensor
FMI 4	•	Voltage below	•	Short to ground on	•	MIL illuminated	•	Faulty harness
		normal, or shorted		the metering side	•	Aborted	•	Faulty sensor
		to low source		of the circuit		regeneration	•	Aftertreatment control module (ACM)
						regeneration	•	Aftertreatment control module (ACM)
FMI 5	•	Current below	•	Short to battery on	•	MIL illuminated	•	Faulty harness
		normal or open		the metering side	•	Regeneration not	•	Faulty sensor
		circuit	•	of the circuit		possible	•	Aftertreatment control module (ACM)
				Open in the		possible	•	Aftertreatment control module (ACM)
				Open in the
				metering side of
			•	the circuit
			•	Open in the
				ground side of
				the circuit

FMI 15	• Data valid but above		•	Temperature	•	MIL illuminated	•	Faulty harness
		normal operating		sensor is out of			•	Faulty sensor
		range - Least severe	•	range (high)
		level	•	Sensor indicates a
				invalid value

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3250, Aftertreatment Diesel Particulate Filter (DPF) Intermediate Gas Temperature – MID 128 PPID 440/ PSID 22

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 1	• Data valid but below		•	Maximum	•	Yellow electronic	•	Malfunction in aftertreatment DPF
		normal operational		allowed multiple		malfunction lamp		burner hydrocarbon dosing system
		range - Most severe		aftertreatment DPF	•	illuminated
		level		burner flame loses	•	Regeneration not
						possible, need
						scab tool to reset

FMI 2	•	Data erratic,	•	Aftertreatment	•	MIL illuminated	•	Faulty sensor
		intermittent or		spark assisted	•	Yellow electronic
		incorrect		DPF flame		malfunction lamp
				temperature		malfunction lamp
				temperature		illuminated
				sensor value	•	illuminated
				sensor value		Regeneration not
				deemed not		Regeneration not
				plausible		possible
				plausible

FMI 3	•	Voltage above	• Circuit shorted to +		•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	Yellow electronic	•	Faulty sensor
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
					•	possible
					•	Aborted
						regeneration

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty sensor
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
						possible

FMI 9	•	Abnormal update	•	Aftertreatment	•	Yellow electronic	• Faulty in Aftertreatment DPF burner
		rate		DPF burner flame		malfunction lamp		fuel system
				temperature not		illuminated
				controllable

FMI 10	•	Abnormal rate of	•	Maximum	•	Yellow electronic	•	Malfunction in aftertreatment DPF
		change		allowed multiple		malfunction lamp		burner dosing system
				aftertreatment DPF	•	illuminated
				burner flame loses	•	Regeneration not
						possible, need
						scab tool to reset

FMI 11	•	Failure mode not	•	Single	•	Yellow electronic	•	Malfunction in aftertreatment DPF
		identifiable		aftertreatment DPF		malfunction lamp		burner dosing system
				burner flame lose	•	illuminated
					•	Aborted
						regeneration

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 13	•	Out of calibration	•	Aftertreatment	•	N/A	• Faulty in aftertreatment DPF burner
				spark assisted			air system
				DPF flame
				temperature not
				controllable

FMI 14	•	Out of calibration	•	Single	•	Yellow electronic	• Malfunction in aftertreatment DPF
				aftertreatment DPF		malfunction lamp	burner dosing system
				burner flame lose	•	illuminated
					•	Regeneration not
					•	possible
					•	Aborted
						regeneration

ECM SPN 3251, Aftertreatment DPF Differential Pressure – MID 128 PID 81

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Critically high	•	Engine derate	•	Aftertreatment diesel particulate filter
		normal operational		pressure	•	Red engine		(DPF) differential pressure sensor
		range				shutdown lamp		failure
						shutdown lamp
						illuminated

FMI 2	•	Data erratic,	•	Sensor is not	•	MIL illuminated	•	Aftertreatment diesel particulate filter
		intermittent or		rational				(DPF) differential pressure sensor
		incorrect						failure

FMI 3	•	Voltage above	• Short to battery on		•	MIL illuminated	•	Aftertreatment diesel particulate filter
		normal, or shorted	•	the metering side				(DPF) differential pressure sensor
		to high source	•	Open in the				failure
				ground line			• Faulty aftertreatment diesel particulate
								filter (DPF) differential pressure sensor
							•	connector
							•	Faulty harness
FMI 5	•	Current below	•	Open in 5 volt	•	MIL illuminated	•	Aftertreatment diesel particulate filter
		normal or open		supply line				(DPF) differential pressure sensor
		circuit	• Short to ground in				•	failure
			•	metering line			•	Faulty harness
			•	Open in metering
				line

FMI 16	• Data valid but above		•	Moderately high	•	Engine derate	•	Aftertreatment diesel particulate filter
		normal operating		pressure				(DPF) differential pressure sensor
		range - Moderately						failure
		severe level

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3363, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater

– MID 128 PSID 75

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Commanded	•	N/A	• Faulty harness or connectors
		intermittent or		valve position is			•	Aftertreatment DEF tank temperature
		incorrect		not plausible				sensor
							• Aftertreatment DEF tank heating valve
FMI 3	•	Voltage above	•	Circuit shorted +	•	N/A	•	Aftertreatment DEF pump assembly
		normal, or shorted
		to high source

FMI 4	•	Voltage below	•	Circuit shorted –	•	N/A	•	Aftertreatment DEF pump assembly
		normal, or shorted	•	Open circuit
		to low source
FMI 5	•	Current below	•	Open circuit	•	N/A	•	Aftertreatment DEF pump assembly
		normal or open
		circuit

ECM SPN 3471, Aftertreatment Fuel Pressure Control Actuator/ MP8 Engine– MID 128 PPID 328

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		battery	•	Yellow electronic	•	Actuator failure
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		ground	•	Yellow electronic	•	Actuator failure
		to low source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Actuator failure
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 7	•	Mechanical system	•	Aftertreatment	•	MIL illuminated	• Fuel shut off valve stuck open
		not responding or		hydrocarbon	•	Yellow electronic	•	Faulty fuel pressure sensor
		out of adjustment		doser fuel		malfunction lamp
				pressure too low		malfunction lamp
				pressure too low		illuminated
					•	illuminated
					•	Regeneration not
						possible

FMI 14	•	Special instructions	•	Aftertreatment	•	MIL illuminated	•	Fuel shut off valve leakage
				hydrocarbon	•	Yellow electronic
				doser fuel		malfunction lamp
				pressure too high		malfunction lamp
				pressure too high		illuminated
					•	illuminated
					•	Regeneration not
						possible

ECM SPN 3471, Aftertreatment Fuel Pressure Control Actuator/ MP7 Engine

– MID 128 PSID 111

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		battery	•	Yellow electronic	•	Faulty connector
		to high source				malfunction lamp	• Faulty aftertreatment fuel pump
						malfunction lamp	• Faulty aftertreatment fuel pump
					•	illuminated
					•	Regeneration not
						possible

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		ground	•	Yellow electronic	•	Faulty connector
		to low source				malfunction lamp	• Faulty aftertreatment fuel pump
						malfunction lamp	• Faulty aftertreatment fuel pump
					•	illuminated
					•	Regeneration not
						possible

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty connector
		circuit				malfunction lamp	• Faulty aftertreatment fuel pump
						malfunction lamp	• Faulty aftertreatment fuel pump
					•	illuminated
					•	Regeneration not
						possible

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 12	•	Bad intelligent	•	Aftertreatment	•	MIL illuminated	• Faulty aftertreatment fuel pump
		device or		DPF fuel control	•	Yellow electronic
		component		valve fuel		malfunction lamp
				pressure too low		malfunction lamp
				pressure too low		illuminated
					•	illuminated
					•	Regeneration not
						possible

FMI 14	•	Special instructions	•	Aftertreatment	•	MIL illuminated	• Faulty harness
				DPF fuel control	•	Yellow electronic	• Faulty aftertreatment fuel pump
				valve fuel		malfunction lamp
				pressure too high		malfunction lamp
				pressure too high		illuminated
					•	illuminated
					•	Regeneration not
						possible

ECM SPN 3472, Aftertreatment Diesel Particulate Filter (DPF) Air Pressure Control Actuator– MID 128 PSID 58

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		+	•	Yellow electronic	•	Faulty air shutoff valve
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
					•	regeneration
					•	Regeneration not
						possible

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		–	•	Yellow electronic	•	Faulty air shutoff valve
		to low source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
						possible

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty air shutoff valve
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
					•	regeneration
					•	Regeneration not
						possible

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3473, Aftertreatment Failed to Ignite – MID 128 PSID 22

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 7	•	Mechanical system	•	Multiple failed	•	Yellow electronic	• Faulty aftertreatment DPF ignition coil
		not responding or		aftertreatment		malfunction lamp	•	Aftertreatment DPF burner system
		out of adjustment		diesel particulate	•	illuminated		malfunction
				filter (DPF) ignition		Aborted	•	malfunction
				filter (DPF) ignition				Hardware failure
				failures				Hardware failure
						regeneration
FMI 14	•	Special instructions	•	N/A	•	Yellow electronic	•	Aftertreatment ignition system
						malfunction lamp		malfunction
					•	illuminated
					•	Aborted
						regeneration

ECM SPN 3480, Aftertreatment Diesel Particulate Filter (DPF) Fuel Pressure/ MP8 Engine – MID 128 PPID 437/PSID 108

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	DPF fuel	•	MIL illuminated	• Faulty aftertreatment fuel shut off valve
		intermittent or		pressure sensor	•	Yellow electronic	•	Faulty DPF fuel pressure sensor
		incorrect		is not rational		malfunction lamp	•	Air in fuel
				(plausibility)		malfunction lamp	•	Air in fuel
			•	Aftertreatment	•	illuminated	•	Fuel filter
			•	Aftertreatment	•	Regeneration not	•	Fuel filter
				hydrocarbon doser		possible	•	Aftertreatment fuel pump
				fuel pressure too
				low

FMI 3	•	Voltage above	• Short to battery on		•	MIL illuminated	•	Faulty harness
		normal or shorted to	•	the metering side	•	Yellow electronic	•	Faulty DPF fuel pressure sensor
		high source	•	Open in the		malfunction lamp
				ground line	•	illuminated
					•	Regeneration not
						possible

FMI 5	•	Current below	• Open circuit in the		•	MIL illuminated	•	Faulty harness
		normal or open	•	5 volt supply	•	Yellow electronic	•	Faulty DPF fuel pressure sensor
		circuit	•	Short circuit to		malfunction lamp
				ground in the	•	illuminated
				metering line	•	Regeneration not
			• Open circuit in the			possible
				metering line
FMI 7	•	Mechanical system	•	Mechanical	•	MIL illuminated	•	Faulty aftertreatment hydrocarbon
		not responding or		problem	•	Engine derate	•	doser system
		out of adjustment			•	Possible engine		Aftertreatment hydrocarbon doser
					•	Possible engine		Aftertreatment hydrocarbon doser
					•	shutdown	• Faulty aftertreatment fuel shut off valve
					•	Regeneration not	•	Aftertreatment fuel pump
						possible

Group 28					Engine Control Module (ECM) Diagnostic Trouble
Group 28						Codes (DTCs)
						Codes (DTCs)

FMI 10	• Abnormal rate of	•	Aftertreatment	•	MIL illuminated	• Faulty DPF fuel pressure sensor
	change		hydrocarbon doser	•	Yellow electronic	• Faulty aftertreatment fuel shut off valve
			fuel pressure		malfunction lamp	• Aftertreatment hydrocarbon doser
			sensor stuck		malfunction lamp	• Aftertreatment hydrocarbon doser
		•	Aftertreatment	•	illuminated
		•	Aftertreatment	•	Regeneration not
			hydrocarbon doser		possible
			fuel pressure too		possible
			fuel pressure too
			high

FMI 15	• Data valid but above	•	Fuel pressure	•	MIL illuminated	• Faulty fuel pressure sensor
	normal operating		sensor is out of	•	Regeneration not	• Faulty harness
	range - Least severe	•	range		possible
	level		Sensor indicates a		possible
	level		Sensor indicates a
			invalid value

ECM SPN 3480, Aftertreatment Diesel Particulate Filter (DPF) Fuel Pressure/ MP7 Engine – MID 128 PPID 437

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 2	•	Data erratic,	•	Aftertreatment	•	MIL illuminated	•	Faulty DPF fuel pressure sensor
		intermittent or		DPF fuel control	•	Yellow electronic
		incorrect		valve pressure too		malfunction lamp
				low		malfunction lamp
				low		illuminated
					•	illuminated
					•	Regeneration not
						possible

FMI 3	•	Voltage above	•	Circuit shorted to	•	Yellow electronic	•	Faulty harness
		normal, or shorted		+		malfunction lamp	•	Faulty DPF fuel pressure sensor
		to high source			•	illuminated
					•	Regeneration not
						possible

FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	•	Faulty harness
		normal or open				malfunction lamp	•	Faulty DPF fuel pressure sensor
		circuit			•	illuminated
					•	Regeneration not
						possible

FMI 7	•	Mechanical system	•	Fuel pressure	•	Yellow electronic	• Faulty fuel pressure regulator
		not responding or		either too high or		malfunction lamp	•	Aftertreatment DPF atomization
		out of adjustment		low	•	illuminated		module (fuel pressure regulator)
						Regeneration not		module (fuel pressure regulator)
						Regeneration not
					•	possible
					•	Possible soot
						buildup

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3482, Aftertreatment Diesel Particulate Filter (DPF) Fuel Shutoff Valve – MID 128 PPID 328

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	Yellow electronic	•	Faulty fuel shutoff valve
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
					•	possible
					•	Failed
					•	regeneration
					•	Soot build up
FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	Yellow electronic	•	Faulty fuel shut off valve
		to low source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
					•	possible
					•	Soot build up
FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty fuel shut off valve
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
					•	possible
					•	Failed
					•	regeneration
					•	Soot build up
FMI 7	•	Mechanical system	•	Fuel pressure	•	Yellow electronic	• Faulty fuel pressure sensor
		not responding or		>620 kPa (90 psi)		malfunction lamp	•	Fuel shutoff valve stuck open
		out of adjustment			•	illuminated
					•	Regeneration not
					•	possible
					•	Soot build up
ECM SPN 3483, Aftertreatment Regeneration Status – MID 128 PSID 47

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Unable to	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
		normal operational		achieve needed	•	Possible		clogged
		range - Most severe		aftertreatment		incomplete	• Aftertreatment hydrocarbon doser fuel
		level		temperature		regeneration		pressure too low
						regeneration		pressure too low

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 1	• Data valid but below		•	Aftertreatment	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
		normal operational		temperature too	•	Possible	•	clogged
		range		high		incomplete	•	Aftertreatment hydrocarbon doser fuel
						regeneration	•	pressure too high
							•	Injector leakage (engine)
FMI 10	•	Abnormal rate of	•	Regeneration	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
		change		period too long	•	Regeneration	•	Air leakage
						frequency too	•	Faulty injector(s) (engine)
						high
FMI 12	•	Bad intelligent	•	Regeneration	•	N/A	•	Aftertreatment hydrocarbon doser
		device or		efficiency too low			•	clogged
		component					•	Diesel Particulate Filter (DPF) catalyst
								damaged
							• Diesel Particulate Filter (DPF) catalyst
								clogged
FMI 13	•	Out of Calibration	•	Regeneration	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
				period too long	•	Regeneration	•	Air leakage
						frequency too	•	Fuel line clogged
						high
FMI 15	• Data valid but above		•	Unable to	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
		normal operating		achieve needed	•	Possible	•	clogged
		range - Least severe		temperature		incomplete	•	Aftertreatment hydrocarbon doser fuel
		level				regeneration		pressure too low
						regeneration		pressure too low

FMI 17	• Data valid but below		•	Aftertreatment	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
		normal operating		temperature too	•	Possible	•	clogged
		range - Least severe		high		incomplete	•	Aftertreatment hydrocarbon doser fuel
		level				regeneration		pressure too high
						regeneration	•	pressure too high
							•	Injector leakage (engine)
FMI 31	•	Condition exists	•	Regeneration	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
				period too long	•	Regeneration	•	Air leakage
						frequency too	•	Fuel line clogged
						high
ECM SPN 3484, Aftertreatment Ignition – MID 128 PSID 110/PSID 127

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	N/A	•	MIL illuminated	•	Faulty harness
		normal operational			•	Yellow electronic	•	Faulty aftertreatment DPF coil
		range - Most severe				malfunction lamp
		level				malfunction lamp
		level				illuminated
					•	illuminated
					•	Aborted
						regeneration

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 1	• Data valid but below		•	N/A	•	MIL illuminated	• Faulty harness
		normal operational			•	Yellow electronic	• Faulty aftertreatment DPF coil
		range - Most severe				malfunction lamp
		level				malfunction lamp
		level				illuminated
					•	illuminated
					•	Aborted
						regeneration

FMI 2	•	Data erratic,	•	N/A	•	MIL illuminated	• Faulty harness
		intermittent or			•	Yellow electronic	• Faulty aftertreatment DPF coil
		incorrect				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	• Faulty harness
		normal, or shorted		+	•	Yellow electronic	• Faulty aftertreatment DPF coil
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	• Faulty harness
		normal, or shorted		–	•	Yellow electronic	• Faulty aftertreatment DPF coil
		to low source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	• Faulty harness
		normal or open			•	Yellow electronic	• Faulty aftertreatment DPF coil
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
						regeneration

ECM SPN 3485, Aftertreatment Diesel Particulate Filter (DPF) Atomization Air Pressure – MID 128 PPID 277

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:

FMI 2	• Data erratic,	• Aftertreatment	•	MIL illuminated	•	Faulty sensor
	intermittent or	DPF differential	•	Yellow electronic	•	Aftertreatment DPF air shutoff valve
	incorrect	pressure too low		malfunction lamp		stuck
				malfunction lamp		stuck
			•	illuminated
			•	Regeneration not
			•	possible
			•	Soot build up

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	Yellow electronic	•	Faulty connector
		to high source				malfunction lamp	•	Faulty sensor
						malfunction lamp	•	Faulty sensor
					•	illuminated
					•	Regeneration not
					•	possible
					•	Soot build up
FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty connector
		circuit				malfunction lamp	•	Faulty sensor
						malfunction lamp	•	Faulty sensor
					•	illuminated
					•	Regeneration not
					•	possible
					•	Soot build up
FMI 7	•	Mechanical system	•	Air pressure	•	Yellow electronic	• Faulty aftertreatment DPF atomization
		not responding or		mechanical		malfunction lamp		module air pressure regulator
		out of adjustment		regulator fault	•	illuminated
					•	Regeneration not
					•	possible
					•	Soot build up
FMI 10	•	Abnormal rate of	•	Aftertreatment	•	MIL illuminated	• Clogged internal bleed orifice
		change		DPF atomization	•	Yellow electronic
				module, air bleed		malfunction lamp
				orifice fault		malfunction lamp
				orifice fault		illuminated
					•	illuminated
					•	Regeneration not
					•	possible
					•	Soot build up
FMI 14	•	Special instructions	•	Air pressure	•	MIL illuminated	• Aftertreatment DPF air shutoff valve
				sensor or	•	Yellow electronic	•	Faulty air pressure sensor
				aftertreatment		malfunction lamp	• Faulty atomization air valve
				DPF atomization		malfunction lamp	• Faulty atomization air valve
				module air valve	•	illuminated
				module air valve		Regeneration not
				fault		Regeneration not
					•	possible
					•	Soot build up
ECM SPN 3489, Aftertreatment Air Enable Actuator – MID 128 PSID 122

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 2	•	Data erratic,	•	Exhaust oxygen	•	MIL illuminated	•	Faulty combustion air valve
		intermittent or		deemed too low	•	Yellow electronic
		incorrect				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
					•	possible
					•	Possible soot
						buildup

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		+	•	Yellow electronic	•	Faulty connector
		to high source				malfunction lamp	•	Faulty combustion air valve
						malfunction lamp	•	Faulty combustion air valve
					•	illuminated
					•	Regeneration not
						possible

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		–	•	Yellow electronic	•	Faulty connector
		to low source				malfunction lamp	•	Faulty combustion air valve
						malfunction lamp	•	Faulty combustion air valve
					•	illuminated
					•	Regeneration not
						possible

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty connector
		circuit				malfunction lamp	•	Faulty combustion air valve
						malfunction lamp	•	Faulty combustion air valve
					•	illuminated
					•	Failed
					•	regeneration
					•	Regeneration not
						possible

ECM SPN 3491, Aftertreatment Diesel Particulate Filter (DPF) Atomization Air Actuator – MID 128 PSID 59

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	• Faulty harness
		normal, or shorted		+	•	Yellow electronic	• Faulty atomization air valve
		to high source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
					•	regeneration
					•	Regeneration not
						possible

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	• Faulty harness
		normal, or shorted		–	•	Yellow electronic	• Faulty atomization air valve
		to low source				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
						possible

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	• Faulty atomization air valve
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	Aborted
					•	regeneration
					•	Regeneration not
						possible

FMI 12	•	Bad intelligent	•	Air pressure	•	MIL illuminated	• Faulty atomization air valve
		device or		difference	•	Yellow electronic
		component		between		malfunction lamp
				atomization air		malfunction lamp
				atomization air		illuminated
				valve opened and	•	illuminated
				valve opened and		Regeneration not
				closed, too low		Regeneration not
					•	possible
					•	Possible soot
						buildup

ECM SPN 3509, Sensor Supply Voltage 1 – MID 128 SID 232

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Sensor supply	•	MIL illuminated	•	Faulty harness or connector
		normal, or shorted		voltage out of	•	Incorrect sensor
		to high source		range (high)		values
						values

FMI 4	•	Voltage below	•	Sensor supply	•	MIL illuminated	•	Faulty harness or connector
		normal, or shorted		voltage out of	•	Incorrect sensor
		to low source		range (low)		values
						values

ECM SPN 3510, Sensor Supply Voltage 2 – MID 128 SID 211

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness or connector
		normal, or shorted			•	Incorrect sensor
		to high source				values
						values

FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Faulty harness or connector
		normal, or shorted			•	Incorrect sensor
		to low source				values
						values

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3511, Sensor Supply Voltage 3 – MID 128 PSID 113

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted
		to high source

FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Faulty harness
		normal, or shorted
		to low source

ECM SPN 3512, Sensor Supply Voltage 4 – MID 128 PSID 126

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Sensor supply	•	MIL illuminated	•	Faulty harness
		normal, or shorted		circuit shorted +	•	Incorrect sensor
		to high source				values
						values

FMI 4	•	Voltage below	•	Sensor supply	•	MIL illuminated	•	Faulty harness
		normal, or shorted		circuit shorted –	•	Incorrect sensor
		to low source				values
						values

ECM SPN 3522, Aftertreatment Total Fuel Used – MID 128 PSID 91

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 0	• Data valid but above	•	Aftertreatment	•	N/A	•	DEF system leak
	normal operational		Diesel Exhaust			•	Wrong DEF tank
	range		Fluid (DEF) level			•	Aftertreatment DEF Dosing Module
			change too much			•	Aftertreatment DEF Dosing Module
							failure or wrong module
FMI 1	• Data valid but below	•	Aftertreatment	•	N/A	•	DEF tank level sensor stuck
	normal operational		Diesel Exhaust			•	DEF system clog
	range		Fluid (DEF) level			•	Wrong DEF tank
			change too little			•	Wrong DEF tank
						•	Aftertreatment DEF Dosing Module
							failure or wrong module

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 16	• Data valid but above	•	Aftertreatment	•	N/A		•	DEF system leak
	normal operating		Diesel Exhaust				•	Wrong DEF tank
	range - Moderately		Fluid (DEF) level				•	Aftertreatment DEF Dosing Module
	severe level		change too much				•	Aftertreatment DEF Dosing Module
								failure or wrong module
FMI 18	• Data valid but below	•	Aftertreatment	•	N/A		•	DEF tank level sensor stuck
	normal operating		Diesel Exhaust				•	DEF system clog
	range - Moderately		Fluid (DEF) level				•	Wrong DEF tank
	severe level		change too little				•	Wrong DEF tank
							•	Aftertreatment DEF Dosing Module
								failure or wrong module

ECM SPN 3556, Aftertreatment Hydrocarbon Doser/ MP8 Engine – MID 128 PPID 329

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		battery	•	Yellow electronic	•	Aftertreatment hydrocarbon doser
		to high source				malfunction lamp		failure
						malfunction lamp		failure
					•	illuminated
					•	Regeneration not
						possible

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		ground	•	Yellow electronic	•	Aftertreatment hydrocarbon doser
		to low source				malfunction lamp		failure
						malfunction lamp		failure
					•	illuminated
					•	Regeneration not
						possible

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Aftertreatment hydrocarbon doser
		circuit				malfunction lamp		failure
						malfunction lamp		failure
					•	illuminated
					•	Regeneration not
						possible

FMI 13	•	Out of calibration	•	Aftertreatment	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
				hydrocarbon				failure
				doser clogged			• Fuel shut off valve
							•	Fuel supply failure
FMI 14	•	Special instructions	•	Aftertreatment	•	MIL illuminated	•	Aftertreatment hydrocarbon doser
				hydrocarbon	•	Yellow electronic		failure
				doser leaking		malfunction lamp
						malfunction lamp
					•	illuminated
					•	Regeneration not
						possible

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3556, Aftertreatment Hydrocarbon Doser/ MP7 Engine – MID 128 PPID 329

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		+	•	Yellow electronic	•	Faulty connector
		to high source				malfunction lamp	•	Aftertreatment DPF control valve
						malfunction lamp	•	Aftertreatment DPF control valve
					•	illuminated		failure
						Regeneration not		failure
						Regeneration not
						possible

FMI 4	•	Voltage below	•	Circuit shorted to	•	MIL illuminated	•	Faulty harness
		normal, or shorted		–	•	Yellow electronic	•	Faulty connector
		to low source				malfunction lamp	•	Aftertreatment DPF control valve
						malfunction lamp	•	Aftertreatment DPF control valve
					•	illuminated		failure
						Regeneration not		failure
						Regeneration not
						possible

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Yellow electronic	•	Faulty connector
		circuit				malfunction lamp	•	Aftertreatment DPF control valve
						malfunction lamp	•	Aftertreatment DPF control valve
					•	illuminated		failure
						Regeneration not		failure
						Regeneration not
						possible

ECM SPN 3597, Aftertreatment Diesel Particulate Filter (DPF) Regeneration too Frequent – MID 128 PSID 119

Type of	FMI Description:	Fault Condition:	Possible	Possible Cause:
fault:			Symptoms:

FMI 3	• Voltage above	• Circuit shorted +	• MIL illuminated	•	Faulty harness
	normal, or shorted			•	Faulty connector
	to high source			•	Aftertreatment DEF line heater 1 or 3
				•	Aftertreatment DEF line heater 1 or 3
				•	failure
				•	Aftertreatment DEF pump assembly
					failure
				• Aftertreatment DEF tank heating valve
					failure
				• Aftertreatment Control Module (ACM)

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Faulty harness
		normal, or shorted					•	Faulty connector
		to low source					•	Aftertreatment DEF line heater 1 or 3
							•	Aftertreatment DEF line heater 1 or 3
							•	failure
							•	Aftertreatment DEF pump assembly
								failure
							• Aftertreatment DEF tank heating valve
								failure
							• Aftertreatment Control Module (ACM)
FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open					•	Faulty connector
		circuit					•	Aftertreatment DEF line heater 1 or 3
							•	Aftertreatment DEF line heater 1 or 3
							•	failure
							•	Aftertreatment DEF pump assembly
								failure
							• Aftertreatment DEF tank heating valve
								failure
ECM SPN 3675, Engine Turbocharger Compressor Bypass Valve Position
– MID 128 PPID 330							•	Aftertreatment Control Module (ACM)
– MID 128 PPID 330

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty bypass valve solenoid
		normal, or shorted	•	On/off valve can’t	•	Yellow electronic	•	Faulty harness
		to high source		be activated		malfunction lamp	•	Faulty harness connector
				be activated		malfunction lamp	•	Faulty harness connector
					•	illuminated
					•	Regeneration not
					•	possible
					•	High engine
						braking without
					•	request
					•	Driveability
						affected

FMI 4	•	Voltage below	•	Short circuit -	•	MIL illuminated	•	Faulty bypass valve solenoid
		normal, or shorted	•	Valve constantly	•	Yellow electronic	•	Faulty harness
		to low source		activated		malfunction lamp	•	Faulty harness connector
				activated		malfunction lamp	•	Faulty harness connector
					•	illuminated
					•	Major engine
					•	derate
					•	Exhaust manifold
					•	overheating
					•	Engine shut down

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	• Faulty bypass valve solenoid
		normal or open	•	On/off valve can’t	•	Yellow electronic	•	Faulty harness
		circuit		be activated		malfunction lamp	•	Faulty harness connector
				be activated		malfunction lamp	•	Faulty harness connector
					•	illuminated
					•	Regeneration not
					•	possible
					•	High engine
						braking without
					•	request
					•	Driveability
						affected

FMI 7	•	Mechanical system	•	Mechanically	•	MIL illuminated	•	Leaking pipes
		not responding or	•	Stuck	•	Yellow electronic	•	Faulty bypass valve solenoid
		out of adjustment	•	On/off valve can’t		malfunction lamp
				be activated	•	illuminated
					•	Regeneration not
					•	possible
					•	High engine
						braking without
					•	request
					•	Driveability
					•	affected
					•	Valve constantly
					•	activated
					•	Major engine
					•	derate
					•	Exhaust manifold
					•	overheating
					•	Engine shut down

ECM SPN 3695, Aftertreatment Diesel Particulate Filter (DPF) Switch/MP8 Engine – MID 128 PSID 114

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:
FMI 9	• Abnormal update	• Signal	•	Yellow electronic	• Faulty harness
	rate	missing from		malfunction lamp
		aftertreatment		illuminated
		DPF switch

ECM SPN 3720, Aftertreatment DPF Ash Load Percent – MID 128 PPID 337

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:
FMI 0	• Data valid but above	• Ash level too high	•	Yellow electronic	• Need service, ash level is too high
	normal operational			malfunction lamp
	range - Most severe			illuminated
	level

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 3936, Aftertreatment DPF System – MID 128 PSID 28

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 0	• Data valid but above	•	Aftertreatment	•	MIL illuminated	•	Aftertreatment DPF differential
	normal operational		DPF differential			•	pressure sensor
	range - Most severe		pressure sensor			•	Aftertreatment particulate filter
	level		value too high
FMI 1	• Data valid but below	•	Aftertreatment	•	MIL illuminated	•	Aftertreatment DPF differential
	normal operational		DPF differential			•	pressure sensor
	range - Most severe		pressure sensor			•	Aftertreatment particulate filter
	level		value too low

ECM SPN 4094, NOx Limits Exceeded Due to Insufficient Diesel Exhaust Fluid (DEF) Quality – MID 128 PSID 90

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 1	• Data valid but below	•	Aftertreatment	•	Yellow electronic	•	DEF quality
	normal operational		Diesel Exhaust		malfunction lamp	•	Aftertreatment DEF line clogged
	range - Most severe		Fluid (DEF) dosing	•	illuminated	•	Aftertreatment doser
	level		too low		Engine derate	•	Aftertreatment doser
	level		too low		Engine derate	• Aftertreatment control module failure
						• Aftertreatment control module failure
FMI 14	• Special Instructions	•	Aftertreatment	•	Yellow electronic	•	DEF quality
			Diesel Exhaust		malfunction lamp	•	Aftertreatment DEF line clogged
			Fluid (DEF) dosing	•	illuminated	•	Aftertreatment DEF dosing
			too low		Engine derate	•	Aftertreatment DEF dosing
			too low		Engine derate	• Aftertreatment control module failure
						• Aftertreatment control module failure
FMI 18	• Data valid but below	•	Aftertreatment	•	Yellow electronic	•	DEF quality
	normal operating		Diesel Exhaust		malfunction lamp	•	Aftertreatment DEF line clogged
	range - Moderately		Fluid (DEF) dosing	•	illuminated	•	Aftertreatment DEF dosing
	severe level		too low		Engine derate	•	Aftertreatment DEF dosing
	severe level		too low		Engine derate	• Aftertreatment control module failure
						• Aftertreatment control module failure

ECM SPN 4095, NOx Limits Exceeded Due to Interrupted Diesel Exhaust Fluid (DEF) Dosing – MID 128 PSID 90

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:

FMI 7	• Mechanical system	• Dosing failure	•	MIL illuminated	•	DEF level
	not responding or		•	Aftertreatment	•	Faulty DEF pump
	out of adjustment			Diesel Exhaust	•	Leak in DEF hose
				Diesel Exhaust	•	Leak in DEF hose
				Fluid (DEF) low
				usage

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 4334, Afterteatment Diesel Exhaust Fluid (DEF) Dosing Absolute Pressure – MID 128 PPID 273

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 1	• Data valid but below		•	DEF system	•	MIL illuminated	•	DEF pump
		normal operational		leakage detected	•	No Aftertreatment	•	DEF hose
		range - Most severe				Diesel Exhaust	• Aftertreatment DEF dosing (injector)
		level				Diesel Exhaust
		level				Fluid (DEF)
						Fluid (DEF)
						dosing

FMI 4	•	Voltage below	•	Short Circuit -	•	MIL illuminated	•	DEF pump assembly
		normal, or shorted			•	No Aftertreatment
		to low source				Diesel Exhaust
						Diesel Exhaust
						Fluid (DEF)
						dosing

FMI 5	•	Current below	•	Short Circuit +	•	MIL illuminated	•	DEF pump assembly
		normal or open	•	Open Circuit	•	Yellow electronic
		circuit				malfunction lamp
						malfunction lamp
					•	illuminated
					•	No Aftertreatment
						Diesel Exhaust
						Fluid (DEF)
						dosing

ECM SPN 4339, Aftertreatment SCR Feedback Control Status – MID 128 PSID 90

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Adaptation too	•	N/A	•	NOx sensor
		normal operational		high			•	Aftertreatment Diesel Exhaust Fluid
		range - Most severe						(DEF) dosing system failure
		level						(DEF) dosing system failure
		level

FMI 1	• Data valid but below		•	Adaptation too low	•	N/A	•	NOx sensor
		normal operational					•	Aftertreatment Diesel Exhaust Fluid
		range - Most severe						(DEF) dosing system failure
		level					•	(DEF) dosing system failure
		level						DEF quality
								DEF quality
FMI 10	•	Abnormal rate of	•	Adaptation too	•	N/A	•	NOx sensor
		change		high			•	Aftertreatment Diesel Exhaust Fluid
								(DEF) dosing system failure
FMI 12	•	Bad intelligent	•	Adaptation too low	•	N/A	•	NOx sensor
		device or					•	Aftertreatment Diesel Exhaust Fluid
		component						(DEF) dosing system failure
							•	(DEF) dosing system failure
							•	DEF quality

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 4354, Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1

– MID 128 PSID 103

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted +	•	N/A	•	Faulty harness
		normal, or shorted					•	Faulty connector
		to high source					•	Aftertreatment DEF line heater 1
							•	Aftertreatment DEF line heater 1
								failure

FMI 4	•	Voltage below	•	Circuit shorted –	•	N/A	•	Faulty harness
		normal, or shorted					•	Faulty connector
		to low source					•	Aftertreatment DEF line heater 1
							•	Aftertreatment DEF line heater 1
								failure

FMI 5	•	Current below	•	Open circuit	•	N/A	•	Faulty harness
		normal or open					•	Faulty connector
		circuit					•	Aftertreatment DEF line heater 1
							•	Aftertreatment DEF line heater 1
								failure

ECM SPN 4356, Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
– MID 128 PSID 102

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +	•	N/A	•	Faulty harness
		normal, or shorted					•	Faulty connector
		to high source					•	Aftertreatment DEF line heater 3
							•	Aftertreatment DEF line heater 3
								failure

FMI 4	•	Voltage below	•	Circuit shorted –	•	N/A	•	Faulty harness
		normal, or shorted					•	Faulty connector
		to low source					•	Aftertreatment DEF line heater 3
							•	Aftertreatment DEF line heater 3
								failure

FMI 5	•	Current below	•	Open circuit	•	N/A	•	Faulty harness
		normal or open					•	Faulty connector
		circuit					•	Aftertreatment DEF line heater 3
							•	Aftertreatment DEF line heater 3
								failure

ECM SPN 4374, Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
Speed – MID 128 PSID 87

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 1	• Data valid but below		•	Slow pump speed	•	MIL illuminated	•	Faulty harness
		normal operational			•	No Aftertreatment	•	Faulty connector
		range - Most severe				Diesel Exhaust	•	Aftertreatment DEF pump assembly
		level				Diesel Exhaust
		level				Fluid (DEF)
						Fluid (DEF)		failure
						dosing		failure
						dosing

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 4375, Aftertreatment Diesel Exhaust Fluid Pump (DEF) Drive Percentage – MID 128 PSID 121

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 0	• Data valid but above		•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		normal operational			•	No Aftertreatment	•	Faulty connector
		range - Most severe				Diesel Exhaust	•	Aftertreatment DEF pump assembly
		level				Diesel Exhaust
		level				Fluid (DEF)
						Fluid (DEF)		failure
						dosing		failure
						dosing

FMI 1	• Data valid but below		•	Circuit shorted –	•	MIL illuminated	•	Faulty harness
		normal operational	•	Open circuit	•	No Aftertreatment	•	Faulty connector
		range - Most severe				Diesel Exhaust	•	Aftertreatment DEF pump assembly
		level				Diesel Exhaust
		level				Fluid (DEF)
						Fluid (DEF)		failure
						dosing		failure
						dosing
FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	No Aftertreatment	•	Faulty connector
		to high source				Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Fluid (DEF)		failure
						dosing		failure
						dosing

FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	No Aftertreatment	•	Faulty connector
		to low source				Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Fluid (DEF)		failure
						dosing		failure
						dosing

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	No Aftertreatment	•	Faulty connector
		circuit				Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Fluid (DEF)		failure
						dosing		failure
						dosing

FMI 12	•	Bad intelligent	•	Open circuit	•	MIL illuminated	•	Faulty harness
		device or			•	No Aftertreatment	•	Faulty connector
		component				Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Fluid (DEF)		failure
						dosing		failure
						dosing

FMI 14	•	Special instructions	•	Voltage to pump	•	MIL illuminated	•	Faulty harness
				out of range	•	No Aftertreatment	•	Faulty connector
						Diesel Exhaust	•	Aftertreatment DEF pump assembly
						Fluid (DEF)		failure
						dosing		failure
						dosing

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 4376, Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve

– MID 128 PSID 105

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Faulty harness
		normal, or shorted			•	Not possible to	•	Faulty connector
		to high source				perform afterrun	•	Aftertreatment DEF pump assembly
						perform afterrun	•	Aftertreatment DEF pump assembly
								failure

FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Faulty harness
		normal, or shorted	•	Open circuit	•	Not possible to	•	Faulty connector
		to low source				perform afterrun	•	Aftertreatment DEF pump assembly
						perform afterrun	•	Aftertreatment DEF pump assembly
								failure

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Faulty harness
		normal or open			•	Not possible to	•	Faulty connector
		circuit				perform afterrun	•	Aftertreatment DEF pump assembly
						perform afterrun	•	Aftertreatment DEF pump assembly
								failure

FMI 7	•	Mechanical system	•	Possible	•	MIL illuminated	•	Mechanical fault – DEF return line
		not responding or		mechanical	•	Not possible to		restricted between DEF pump and
		out of adjustment		problem with		perform afterrun	•	DEF tank
				aftertreatment		perform afterrun		Aftertreatment Diesel Exhaust Fluid
				aftertreatment				Aftertreatment Diesel Exhaust Fluid
				diesel exhaust				(DEF) pump assembly
				fluid (DEF) return				(DEF) pump assembly
				fluid (DEF) return
				valve

ECM SPN 4752, Engine Exhaust Gas Recirculation (EGR) Cooler Efficiency

– MID 128 SID 282

Type of	FMI Description:	Fault Condition:	Possible	Possible Cause:
fault:			Symptoms:

FMI 7	• Mechanical system	• Low EGR cooler	• MIL illuminated	• EGR cooler clogged or damaged
	not responding or	efficiency
	out of adjustment

ECM SPN 4811, Engine Piston Cooling Oil Pressure – MID 128 PPID 8

Type of	FMI Description:	Fault Condition:	Possible	Possible Cause:
fault:			Symptoms:

FMI 1	• Data valid but below	• Pressure below	• Red engine	• N/A
	normal operational	range	shutdown lamp
	range - Most severe		illuminated
	level

Group 28					Engine Control Module (ECM) Diagnostic Trouble
Group 28							Codes (DTCs)
							Codes (DTCs)

FMI 3	•	Voltage above	• Short to battery in	•	Yellow electronic	•	Faulty harness
		normal or shorted to	metering line		malfunction lamp
		high source			illuminated

FMI 5	•	Current below	• Open in the	•	Yellow electronic	•	Faulty sensor
		normal or open	metering side		malfunction lamp	•	Faulty harness
		circuit	sensor circuit		illuminated
			• Open circuit in the
			ground line sensor
			circuit

ECM SPN 4813, Engine Oil Thermostat Bypass Valve Opening – MID 128 PSID 72

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 3	•	Voltage above	•	Circuit shorted +	•	Yellow electronic	•	Faulty actuator
		normal, or shorted				malfunction lamp	•	Faulty harness
		to high source			•	illuminated
					•	Oil thermostat is
						always open

FMI 4	•	Voltage below	•	Circuit shorted –	•	Yellow electronic	•	Faulty actuator
		normal, or shorted				malfunction lamp	•	Faulty harness
		to low source			•	illuminated
					•	Oil thermostat is
					•	always closed
					•	Engine may
						overheat

FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	•	Faulty actuator
		normal or open				malfunction lamp	•	Faulty harness
		circuit			•	illuminated
					•	Oil thermostat is
					•	always open
					•	May have
						increased fuel
						consumption

ECM SPN 4815, Engine Cooling Fan Thermal Switch Position – MID 128 PPID 333

Type of	FMI Description:	Fault Condition:	Possible	Possible Cause:
fault:			Symptoms:

FMI 3	• Voltage above	• Circuit shorted to	• Yellow electronic	•	Faulty harness
	normal, or shorted	battery	malfunction lamp	•	Faulty harness connector
	to high source		illuminated	•	Faulty sensor
				•	Faulty sensor

Group 28						Engine Control Module (ECM) Diagnostic Trouble
Group 28								Codes (DTCs)
								Codes (DTCs)

FMI 4	•	Voltage below	•	Short circuit -	•	Yellow electronic	•	Faulty harness
		normal, or shorted				malfunction lamp	•	Faulty harness connector
		to low source				illuminated	•	Faulty sensor
							•	Faulty sensor
FMI 5	•	Current below	•	Open circuit	•	Yellow electronic	•	Faulty harness
		normal or open				malfunction lamp	•	Faulty harness connector
		circuit				illuminated	•	Faulty sensor
							•	Faulty sensor

ECM SPN 5246, Aftertreatment SCR Operator Inducement Severity – MID 128 PSID 46

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:
FMI 0	• Data valid but above	•	Severe SCR	•	Severe engine	•	N/A
	normal operational		system fault		derate
	range - Most severe		detected –
	level		Warning fault

FMI 15	• Data valid but above	•	Moderate SCR	•	Moderate engine	•	N/A
	normal operating		system fault		derate
	range - Least severe		detected –
	level		Warning fault

FMI 16	• Data valid but above	•	SCR system	•	Engine derate	•	N/A
	normal operating		fault detected –
	range - Moderately		Warning fault
	severe level

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 5285, Charge Air Cooler (CAC) Temperature – MID 128 PID 52

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 7	• Mechanical system	•	Boost temperature	•	MIL illuminated	•	Air flow through charge air cooler
	not responding		too high		(13L engine only)		(CAC) too low
	properly					• Charge air cooler (CAC)
FMI 18	• Data valid but below	•	Boost temperature	•	MIL illuminated	•	Air flow through charge air cooler
	normal operating		too high		(13L engine only)	•	(CAC) too low
	range					•	Charge air cooler (CAC)

ECM SPN 5298, Aftertreatment Diesel Oxidation Catalyst (DOC) Conversion Efficiency – MID 128 PSID 99

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 7	• Mechanical system	•	Hydrocarbon	•	MIL illuminated	•	Catalyst failure
	not responding		conversion is too			•	DOC temperature sensor
	properly		low in the Diesel
			Oxidation Catalyst
			(DOC)

FMI 18	• Data valid but below	•	Hydrocarbon	•	MIL illuminated	•	Catalyst failure
	normal operating		conversion is too			•	DOC temperature sensor
	range - Moderately		low in the Diesel
	severe level		Oxidation Catalyst
			(DOC)

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 5392, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve Loss of Prime – MID 128 PSID 121

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:

FMI 7	•	Mechanical system	•	Aftertreatment	•	MIL illuminated	•	Empty DEF tank
		not responding		Diesel Exhaust	•	Yellow electronic	•	DEF filter clogged
		properly		Fluid (DEF)		malfunction lamp	•	DEF inlet pipe leak or blockage
				pressure build		malfunction lamp	•	DEF inlet pipe leak or blockage
				up failure	•	illuminated	•	DEF pump assembly
				up failure		No Aftertreatment	•	DEF pump assembly
						No Aftertreatment
						Diesel Exhaust
						Fluid (DEF)
						dosing

FMI 31	•	Condition exists	•	Aftertreatment	•	MIL illuminated	•	Empty DEF tank
				Diesel Exhaust	•	Yellow electronic	•	DEF filter clogged
				Fluid (DEF)		malfunction lamp	•	DEF inlet pipe leak or blockage
				pressure build		malfunction lamp	•	DEF inlet pipe leak or blockage
				up failure	•	illuminated	•	DEF pump assembly
				up failure		No Aftertreatment	•	DEF pump assembly
						No Aftertreatment
						Diesel Exhaust
						Fluid (DEF)
						dosing

ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve
– MID 128 PSID 89

Type of	FMI Description:		Fault Condition:		Possible		Possible Cause:
fault:					Symptoms:
FMI 0	• Data valid but above		•	Low side circuit	•	MIL illuminated	•	Aftertreatment DEF dosing pump
		normal operational		shorted to +				assembly
		range - Most severe
		level

FMI 1	• Data valid but below		•	Short to ground	•	MIL illuminated	•	Aftertreatment DEF dosing pump
		normal operational	•	Low side circuit				assembly
		range - Most severe		open
		level		open
		level

FMI 3	•	Voltage above	•	Circuit shorted +	•	MIL illuminated	•	Aftertreatment DEF dosing pump
		normal, or shorted						assembly
		to high source

FMI 4	•	Voltage below	•	Circuit shorted –	•	MIL illuminated	•	Aftertreatment DEF dosing pump
		normal, or shorted						assembly
		to low source

FMI 5	•	Current below	•	Open circuit	•	MIL illuminated	•	Aftertreatment DEF dosing
		normal or open			•	Yellow electronic	•	Aftertreatment DEF dosing pump
		circuit				malfunction lamp		assembly
						malfunction lamp		assembly
						illuminated

FMI 14	•	Special instructions	•	Aftertreatment	•	MIL illuminated	• Aftertreatment DEF doser clogged
				DEF dosing	•	Yellow electronic	•	Hose clogged
				clogged or hose		malfunction lamp
				clogged		malfunction lamp
				clogged		illuminated
						illuminated

Engine Control Module (ECM) Diagnostic Trouble

Group 28

Codes (DTCs)

ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve

– MID 128 PSID 90

Type of	FMI Description:	Fault Condition:		Possible		Possible Cause:
fault:				Symptoms:

FMI 1	• Data valid but below	•	Dosing failure	•	MIL illuminated	•	NOx sensor
	normal operational	•	Aftertreatment	•	NOx emissions	•	SCR catalyst malfunction
	range		Diesel Exhaust		too high	•	EGR mass flow failure
			Diesel Exhaust		too high	•	EGR mass flow failure
			Fluid (DEF) dosing			•	SCR inlet temperature sensor
			amount too low or			•	SCR inlet temperature sensor
			DEF quality

FMI 17	• Data valid but below	•	Dosing failure	•	MIL illuminated	•	NOx sensor
	normal operating	•	Aftertreatment	•	NOx emissions	•	SCR catalyst malfunction
	range - Least severe		Diesel Exhaust		too high	•	EGR mass flow failure
	level		Diesel Exhaust		too high
	level		Fluid (DEF) dosing
			Fluid (DEF) dosing			•	SCR inlet temperature sensor
			amount too low or			•	SCR inlet temperature sensor
			DEF quality

ECM SPN 5485, Aftertreatment Diesel Exhaust Fluid (DEF) Pump Orifice

– MID 128 PSID 121

Type of	FMI Description:	Fault Condition:	Possible		Possible Cause:
fault:			Symptoms:

FMI 11	• Root cause not	• Aftertreatment	•	MIL illuminated	•	Bleed orifice
	known	Diesel Exhaust	•	Yellow electronic	•	Aftertreatment Diesel Exhaust Fluid
		Fluid (DEF) bleed		malfunction lamp		(DEF) pressure sensor
		orifice clogged		malfunction lamp		(DEF) pressure sensor
		orifice clogged		illuminated
			•	illuminated
			•	No Aftertreatment
				Diesel Exhaust
				Fluid (DEF)
				dosing

Mack Trucks, Inc.

Greensboro, NC USA

http://www.macktrucks.com