Diagnostic Trouble Codes
The following table lists all the J1939 diagnostic trouble codes for the engine. The table includes a description for each code and the recommended troubleshooting procedure that must be performed.
Portions of this material are reprinted with permission from SAE J1939DA_201607© 2016 SAE International. SAE International is not responsible for any use or translation of this material, in whole or in part. Contact SAE International to obtain a complete copy of SAE J1939DA_201607, the official definitive source of this standard.
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| J1939 Code | Description | Refer to Procedure |
|---|---|---|
| 27-3 | EGR #1 Valve Position : Voltage Above Normal | Troubleshooting, "Valve Position - Test" |
| 27-4 | EGR #1 Valve Position : Voltage Below Normal | Troubleshooting, "Valve Position - Test" |
| 27-7 | EGR #1 Valve Position : Not Responding Properly | Troubleshooting, "Valve Position - Test" |
| 29-3 | Accelerator Pedal Position #2 : Voltage Above Normal | Troubleshooting, "Speed Control (Analog) - Test" |
| 29-4 | Accelerator Pedal Position #2 : Voltage Below Normal | Troubleshooting, "Speed Control (Analog) - Test" |
| 51-3 | Engine Throttle Position : Voltage Above Normal | Troubleshooting, "Valve Position - Test" |
| 51-4 | Engine Throttle Position : Voltage Below Normal | Troubleshooting, "Valve Position - Test" |
| 91-3 | Accelerator Pedal Position #1 : Voltage Above Normal | Troubleshooting, "Speed Control (Analog) - Test" |
| 91-4 | Accelerator Pedal Position #1 : Voltage Below Normal | Troubleshooting, "Speed Control (Analog) - Test" |
| 100-1 | Engine Oil Pressure : Low - most severe (3) | Troubleshooting, "Oil Pressure Is Low" |
| 102-3 | Engine Intake Manifold #1 Pressure : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 102-4 | Engine Intake Manifold #1 Pressure : Voltage Below Normal
(Turbocharged engines only) |
Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 108-3 | Barometric Pressure : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 108-4 | Barometric Pressure : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 110-0 | Engine Coolant Temperature : High - most severe (3) | Troubleshooting, "Coolant Temperature Is High" |
| 110-3 | Engine Coolant Temperature : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 110-4 | Engine Coolant Temperature : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 157-0 | Engine Injector Metering Rail #1 Pressure : High - most severe (3) | Troubleshooting, "Fuel Rail Pressure Problem" |
| 157-1 | Engine Injector Metering Rail #1 Pressure : Low - most severe (3) | Troubleshooting, "Fuel Rail Pressure Problem" |
| 157-3 | Engine Injector Metering Rail #1 Pressure : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 157-4 | Engine Injector Metering Rail #1 Pressure : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 157-15 | Engine Injector Metering Rail #1 Pressure : High - least severe (1) | Troubleshooting, "Fuel Rail Pressure Problem" |
| 166-14 | Engine Rated Power : Special Instruction | Troubleshooting, "System Overview" |
| 168-3 | Battery Potential / Power Input #1 : Voltage Above Normal | Troubleshooting, "Electrical Power Supply - Test" |
| 168-4 | Battery Potential / Power Input #1 : Voltage Below Normal | Troubleshooting, "Electrical Power Supply - Test" |
| 172-3 | Engine Air Inlet Temperature : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 172-4 | Engine Air Inlet Temperature : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 172-16 | Engine Air Inlet Temperature : High - moderate severity (2) | Troubleshooting, "Intake Manifold Air Temperature Is High" |
| 174-3 | Engine Fuel Temperature 1 : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 174-4 | Engine Fuel Temperature 1 : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 174-16 | Engine Fuel Temperature 1 : High - moderate severity (2) | Troubleshooting, "Fuel Temperature Is High" |
| 190-0 | Engine Speed : High - most severe (3) | Troubleshooting, "Engine Overspeeds" |
| 558-3 | Accelerator Pedal #1 Low Idle Switch : Voltage Above Normal | Troubleshooting, "Idle Validation - Test" |
| 558-4 | Accelerator Pedal #1 Low Idle Switch : Voltage Below Normal | Troubleshooting, "Idle Validation - Test" |
| 628-2 | Program Memory : Erratic, Intermittent, or Incorrect | Contact the Dealer Solutions Network (DSN) |
| 630-2 | Calibration Memory : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Code - Calibrate" |
| 630-13 | Calibration Memory : Out of Calibration | Troubleshooting, "Injector Code - Calibrate" |
| 630-14 | Calibration Memory : Special Instruction | Troubleshooting, "Injector Code - Calibrate" |
| 630-31 | Calibration Memory | Troubleshooting, "Injector Code - Calibrate" |
| 639-14 | J1939 Network #1 : Special Instruction | Troubleshooting, "Data Link Configuration Status - Test" |
| 651-3 | Engine Injector Cylinder #01 : Voltage Above Normal | Troubleshooting, "Injector Solenoid - Test" |
| 652-3 | Engine Injector Cylinder #02 : Voltage Above Normal | Troubleshooting, "Injector Solenoid - Test" |
| 653-3 | Engine Injector Cylinder #03 : Voltage Above Normal | Troubleshooting, "Injector Solenoid - Test" |
| 654-3 | Engine Injector Cylinder #04 : Voltage Above Normal
(4 cylinder engines only) |
Troubleshooting, "Injector Solenoid - Test" |
| 676-3 | Engine Glow Plug Relay : Voltage Above Normal | Troubleshooting, "Glow Plug Starting Aid - Test" |
| 676-4 | Engine Glow Plug Relay : Voltage Below Normal | Troubleshooting, "Glow Plug Starting Aid - Test" |
| 677-3 | Engine Starter Motor Relay : Voltage Above Normal | Troubleshooting, "Relay - Test (Start Relay)" |
| 677-4 | Engine Starter Motor Relay : Voltage Below Normal | Troubleshooting, "Relay - Test (Start Relay)" |
| 723-2 | Engine Speed Sensor #2 : Erratic, Intermittent, or Incorrect | Troubleshooting, "Speed/Timing - Test" |
| 723-8 | Engine Speed Sensor #2 : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Speed/Timing - Test" |
| 970-7 | Engine Auxiliary Engine Shutdown Switch : Not Responding Properly | Troubleshooting, "Shutdown (Ground Level) - Test" |
| 1071-3 | Cooling Fan Drive Output : Voltage Above Normal | Troubleshooting, "Relay - Test (Fan Drive)" |
| 1071-4 | Cooling Fan Drive Output : Voltage Below Normal | Troubleshooting, "Relay - Test (Fan Drive)" |
| 1075-3 | Engine Electric Lift Pump for Engine Fuel Supply : Voltage Above Normal | Troubleshooting, "Relay - Test (Lift Pump)" |
| 1075-4 | Engine Electric Lift Pump for Engine Fuel Supply : Voltage Below Normal | Troubleshooting, "Relay - Test (Lift Pump)" |
| 1347-3 | Engine Fuel Pump Pressurizing Assembly #1 : Voltage Above Normal | Troubleshooting, "Solenoid Valve - Test" |
| 1347-4 | Engine Fuel Pump Pressurizing Assembly #1 : Voltage Below Normal | Troubleshooting, "Solenoid Valve - Test" |
| 1347-7 | Engine Fuel Pump Pressurizing Assembly #1 : Not Responding Properly | Troubleshooting, "Solenoid Valve - Test" |
| 1485-14 | ECM Main Relay : Special Instruction | Refer to the OEM for information on the main power relay. |
| 1746-31 | Security Device | The machine security device has not been disabled. Refer to the machine documentation for further information on the machine security system. |
| 2791-3 | Engine Exhaust Gas Recirculation (EGR) Valve Control : Voltage Above Normal | Troubleshooting, "Motorized Valve - Test" |
| 2791-10 | Engine Exhaust Gas Recirculation (EGR) Valve Control : Abnormal Rate of Change | Troubleshooting, "Motorized Valve - Test" |
| 2797-3 | Engine Injector Group 1 : Voltage Above Normal | Troubleshooting, "Injector Solenoid - Test" |
| 2797-4 | Engine Injector Group 1 : Voltage Below Normal | Troubleshooting, "Injector Solenoid - Test" |
| 2797-5 | Engine Injector Group 1 : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
| 2798-3 | Engine Injector Group 2 : Voltage Above Normal | Troubleshooting, "Injector Solenoid - Test" |
| 2798-4 | Engine Injector Group 2 : Voltage Below Normal | Troubleshooting, "Injector Solenoid - Test" |
| 2798-5 | Engine Injector Group 2 : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
| 2840-12 | ECU Instance : Failure | Contact the Dealer Solutions Network (DSN) |
| 2840-14 | ECU Instance : Special Instruction | Contact the Dealer Solutions Network (DSN) |
| 2950-2 | Engine Intake Valve Actuator #1 : Erratic, Intermittent, or Incorrect
(If equipped) |
Troubleshooting, "Motorized Valve - Test" |
| 2950-3 | Engine Intake Valve Actuator #1 : Voltage Above Normal
(If equipped) |
Troubleshooting, "Valve Position - Test" |
| 2950-4 | Engine Intake Valve Actuator #1 : Voltage Below Normal
(If equipped) |
Troubleshooting, "Valve Position - Test" |
| 2950-7 | Engine Intake Valve Actuator #1 : Not Responding Properly
(If equipped) |
Troubleshooting, "Motorized Valve - Test" |
| 2970-3 | Accelerator Pedal #2 Low Idle Switch : Voltage Above Normal | Troubleshooting, "Idle Validation - Test" |
| 2970-4 | Accelerator Pedal #2 Low Idle Switch : Voltage Below Normal | Troubleshooting, "Idle Validation - Test" |
| 3509-3 | Sensor Supply Voltage 1 : Voltage Above Normal | Troubleshooting, "Sensor Supply - Test" |
| 3509-4 | Sensor Supply Voltage 1 : Voltage Below Normal | Troubleshooting, "Sensor Supply - Test" |
| 3510-3 | Sensor Supply Voltage 2 : Voltage Above Normal | Troubleshooting, "Sensor Supply - Test" |
| 3510-4 | Sensor Supply Voltage 2 : Voltage Below Normal | Troubleshooting, "Sensor Supply - Test" |
| 3597-0 | ECU Power Output Supply Voltage #1 : High - most severe (3) | Troubleshooting, "Engine Shutdown Occurs Intermittently" |
| 3597-1 | ECU Power Output Supply Voltage #1 : Low - most severe (3) | Troubleshooting, "Power Is Intermittently Low Or Power Cutout Is Intermittent" |
| 4201-2 | Engine Speed Sensor #1 : Erratic, Intermittent, or Incorrect | Troubleshooting, "Speed/Timing - Test" |
| 4201-8 | Engine Speed Sensor #1 : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Speed/Timing - Test" |
| 4765-3 | Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Voltage Above Normal
(4 cylinder engines only, if equipped) |
Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 4765-4 | Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Voltage Below Normal
(4 cylinder engines only, if equipped) |
Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 4766-3 | Aftertreatment #1 Diesel Oxidation Catalyst Outlet Gas Temperature : Voltage Above Normal
(4 cylinder engines only, if equipped) |
Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 4766-4 | Aftertreatment #1 Diesel Oxidation Catalyst Outlet Gas Temperature : Voltage Below Normal
(4 cylinder engines only, if equipped) |
Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 5838-14 | EGR Valve Malfunction : Special Instruction | The NRS valve has reached 3100 service hours without a 3000-hour service being performed. The engine performance is derated until the service is completed. Refer to the Operation and Maintenance Manual for further information. |
| 5838-31 | EGR Valve Malfunction | The NRS valve is due a 3000-hour service. Refer to the Operation and Maintenance Manual for further information. |
| 6323-7 | Engine Fuel Supply Pump : Not Responding Properly | Troubleshooting, "Fuel Rail Pressure Problem" |
| 6323-14 | Engine Fuel Supply Pump : Special Instruction | Troubleshooting, "Fuel Rail Pressure Problem" |
Caterpillar Information System:
EMCP4.2B Utility Circuit Breaker Failure to Open Circuit Fault
C1.7 and C2.2 Industrial Engine Electrical Connectors
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Seal - Remove and Install - Pony Rod Seal
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Pinion Shaft - Remove and Install
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Crankshaft - Remove and Install
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Gear (Bull) - Remove and Install
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Crosshead - Assemble
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Crosshead - Disassemble
WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS and WSF255 XD Well Stimulation Pumps Crosshead - Remove and Install
C175-20 Locomotive Engine DEF Tank Temperature Is High
794 AC Off-Highway Truck Machine Systems Accumulator (Steering) - Remove and Install
794 AC Off-Highway Truck Machine Systems Brake Accumulator (Parking, Service) - Remove and Install - Front, Rear, and Supply
C1.7 and C2.2 Industrial Engine Alternator Problem
3516E Generator Set Engine Cat ET Service Features
C175-16 Locomotive Engine Coolant Pressure Is Low
C175-16 Locomotive Engine Coolant Temperature Control Module - Test
C175-16 Locomotive Engine Data Link - Test
SRMP Electric Power Generation SRMP Generator Terminal Box - Remove and Install
3516B Generator Set Engines with Dynamic Gas Blending Crankcase Breather
EMCP4.2B Utility Circuit Breaker Failure to Close Circuit Fault
Shutoff Valve Leaking on Engine Oil Pan on Certain C4.4 Engines{1307} Shutoff Valve Leaking on Engine Oil Pan on Certain C4.4 Engines{1307}
C1.7 and C2.2 Industrial Engine Engine Does Not Crank
EMCP4.2B General Information
EMCP4.2B Component Location