Cummins Fault Codes List: 2637 (BCL) to 2962

Page 7 of 19 of the full Cummins fault code list (1,847 codes). Each entry is the code as the machine reports it and what the manufacturer data says it means.

Cummins codes 2637 (BCL) to 2962

2637 (BCL)Aftertreatment Diesel Oxidation Catalyst Face Plugged - Root Cause Not Known
2637 ISXAftertreatment Diesel Oxidation Catalyst Face Plugged - Root Cause Not Known
2637 (X)Aftertreatment Diesel Oxidation Catalyst face Plugged- Root Cause not Known
2638Catalyst Efficiency - Out of Calibration. The temperature increase across the aftertreatment diesel oxidation catalyst is lower than expected.
2638 (BCL)Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency - Data Valid But Below Normal Operating Range - Least Severe Level
2638 (X)Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency - Data Valid But Below Normal Operating Range - Least Severe Level
2639 (BCL)Aftertreatment Diesel Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range - Least Severe Level
2639 (X)Aftertreatment Diesel Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range - Least Severe Level
264Fuel Temperature Sensor Error
2646Engine Coolant Temperature - Condition Exists. The EGR valve was closed to reduce engine coolant temperature.
265Engine Fuel Temperature Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at engine fuel temperature circuit.
2659Engine Coolant Temperature - Condition Exists. The EGR valve was closed to reduce engine coolant temperature.
266Engine Fuel Temperature - Data Valid But Above Normal Operating Range - Most Severe Level
2661At Least One Unacknowledged Most Severe Fault - Condition Exists
2662At Least One Unacknowledged Moderately Severe Fault - Condition Exists
267Ambient Air temperature Signal Incorrect
268Injector Metering Rail 1 Pressure - Data Erratic, Intermittent, or Incorrect. The ECM has detected that the fuel pressure signal is not changing.
269Antitheft Password Valid Indicator — Data Erratic, Intermittent, or Incorrect. Engine ignition attempt without authorization from immobilizer anti-theft device.
2692Aftertreatment 1 Diesel Particulate Filter System- Data Erratic, Intermittent, or Incorrect
2697Accelerator Pedal or Lever Idle Validation Switch Circuit - Out of Calibration
271Fuel Pump Pressurizing Assembly 1 Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fuel pump actuator circuit.
2717Engine Control Module Calibration Program Memory (RAM) Corruption - Condition Exists
2718Brake And Throttle Conflict- Condition Exists
2719Brake Inactivity - Condition Exists.
271 (Auto)High Fuel Pressure Solenoid Valve Circuit - Voltage Below Normal or Shorted to Low Source. Electronic fuel control actuator shorted low.
271 BHigh Fuel Pressure Solenoid Valve Circuit - Voltage Below Normal or Shorted to Low Source
271 CLHigh Fuel Pressure Solenoid Valve Circuit - Voltage Below Normal or Shorted to Low Source
271 (ISC - Auto)High Fuel Pressure Solenoid Valve Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fuel pump actuator circuit.
272Fuel Pump Pressurizing Assembly 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the fuel pump actuator circuit.
2727SAE J1939 Data Link 2 Engine Network - Abnormal Update Rate
2728Aftertreatment Fuel Injector 1 - Data Valid but Above Normal Operational Range - Moderately Severe Level. Active regeneration of the aftertreatment diesel particulate filter has been detected to be ineffective.
272 (Auto)High Fuel Pressure Solenoid Valve Circuit - Voltage Above Normal or Shorted to High Source. Electronic fuel control actuator shorted high.
272 BHigh Fuel Pressure Solenoid Valve Circuit - Voltage Above Normal or Shorted to High Source
272 CLHigh Fuel Pressure Solenoid Valve Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the fuel pump actuator circuit.
272 (ISC - Auto)High Fuel Pressure Solenoid Valve Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the fuel pump actuator circuit.
273Low or no current detected at the rear pumping valve pin 15 of the engine harness
2732Aftertreatment Fuel Drain Valve Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at the aftertreatment fuel drain valve circuit.
2733Aftertreatment Fuel Drain Valve Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the aftertreatment fuel drain valve circuit.
2734Start Enable Device 1 Canister Empty (Ether Injection) - Data Valid But Below Normal Operating Range - Least Severe Level
2735Exhaust Gas Temperature Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source
2736Exhaust Gas Temperature Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
2737Exhaust Gas Temperature - Data Valid but Above Normal Operating Range - Most Severe Level
2738Start Enable Device 1 Circuit (Ether Injection) - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the ether start solenoid circuit.
2739Start Enable Device 1 Circuit (Ether Injection) - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the ether start solenoid circuit.
274High current detected at the rear pumping valve pin 15 of the engine harness.
2741Aftertreatment Fuel Shutoff Valve 1 Swapped - Condition Exists. Aftertreatment fuel shutoff valve 1 and aftertreatment fuel drain valve wiring harness connections are reversed.
2742Aftertreatment Exhaust Gas Temperature 2 - Data Valid but Below Normal Operating Range - Least Severe Level. The temperatures in the aftertreatment system can not reach the required temperatures for stationary regeneration.
2743Aftertreatment Exhaust Gas Temperature 2 - Data Valid but Below Normal Operating Range - Moderately Severe Level. The temperatures in the aftertreatment system can not reach the required temperatures for stationary regeneration.
275Front Pumping Element. The electronic control module (ECM) has detected a malfunction in the front pumping element.
2754Engine Particulate Filter Inlet Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level. Excessive black smoke has been detected exiting the engine and entering the aftertreatment diesel particulate filter.
2754 (BCL)Engine Diesel Particulate Filter Intake Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level
2754 (X)Engine Diesel Particulate Filter Intake Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level
276High current detected on injection control valve stator return pin 7.
2764Exhaust Gas Pressure - Data Valid but Above Normal Operating Range - Moderately Severe Level. High exhaust gas pressure has been detected by the exhaust gas pressure sensor.
2765Engine Injector Bank 1 Barcodes - Out of Calibration. Invalid injector barcode information has been entered.
277Engine ECM has detected a malfunction in the injection control valve
2771Aftertreatment Outlet NOx Sensor - Abnormal Update Rate. No communications or valid data transfer rate detected on the J1939 datalink between the ECM and the aftertreatment outlet NOx sensor.
2772Aftertreatment Outlet NOx - Data Valid But Above Normal Operational Range - Least Severe Level. The engine NOx output is higher than recommended levels.
2772 (Air Assisted)Aftertreatment Outlet NOx - Data Valid But Above Normal Operating Range - Least Severe Level
2772 (Airless)Aftertreatment Outlet NOx - Data Valid But Above Normal Operating Range- Least Severe Level
2773Aftertreatment Outlet NOx - Data Valid but Above Normal Operational Range - Most Severe Level. The engine NOx output is higher than recommended levels.
2773 (Air Assisted)Aftertreatment Outlet NOx - Data Valid but Above Normal Operating Range - Most Severe Level
2773 (Airless)Aftertreatment Outlet NOx - Data Valid but Above Normal Operating Range - Most Severe Level
2774Exhaust Gas Recirculation (EGR) System - Condition Exists. Plugged EGR differential pressure sensor tubes have been detected.
2777Particulate Trap Active Regeneration Inhibited Due to Inhibit Switch - Condition Exists. Regeneration of the diesel particulate filter has been prevented due to the permit switch being disabled.
2778Aftertreatment Fuel Rate - Data Valid but Above Normal Operational Range - Moderately Severe Level. The lubricating engine oil needs to be changed due to possible fuel dilution.
278Error detected in lift pump circuit at pins 11 and 22 of the engine harness.
2789Engine Coolant Temperature - Data Valid but Below Normal Operational Range - Moderately Severe Level. Engine coolant temperature is below normal operating temperature limits.
279Electronic Fuel Injection Control Valve Circuit - Voltage Below Normal or Shorted to Low Source
281Fuel Pump Pressurizing Assembly 1 - Mechanical System Not Responding Properly or Out of Adjustment. A pumping imbalance between the front and rear pumping plungers has been detected.
2813EGR Valve Control - Special Instructions. The EGR valve has been closed during regeneration of the aftertreatment diesel particulate filter.
282Engine ECM has detected a failure in the rear pumping element
283High voltage detected at main engine speed sensor voltage supply pin 8 of the engine harness
284Engine Speed/Position Sensor (Crankshaft) Supply Voltage Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected on the ECM voltage supply line to engine speed sensor.
285SAE J1939 Multiplexing PGN Timeout Error - Abnormal Update Rate. The Cummins® ECM did not receive a multiplexed message from an OEM VECU or SIM within the time limit or did not receive it at all.
285 (IND)SAE J1939 Multiplexing PGN Timeout Error - Abnormal Update Rate
285 (Industrial)SAE J1939 Multiplexing PGN Timeout Error - Abnormal Update Rate
285 (PG)SAE J1939 Multiplexing PGN Timeout Error - Abnormal Update Rate
285 (Power Generation)SAE J1939 Multiplexing PGN Timeout Error - Abnormal Update Rate
286SAE J1939 Multiplexing Configuration Error - Out of Calibration. The ECM expected information from a multiplexed device but only received a portion of the necessary information.
287SAE J1939 Multiplexing Accelerator Pedal or Lever Sensor System Error - Received Network Data Error. The OEM vehicle electronic control unit (VECU) detected a fault with its accelerator pedal.
2878Aftertreatment Fuel Drain Valve - Mechanical System Not Responding Properly or Out of Adjustment
2878 (ISM)Aftertreatment Fuel Drain Valve - Mechanical System Not Responding Properly or Out of Adjustment. The aftertreatment fuel shutoff drain valve has been detected to be stuck closed.
2878 (ISX)Aftertreatment Fuel Drain Valve - Mechanical System Not Responding Properly or Out of Adjustment. The aftertreatment fuel shutoff drain valve has been detected to be stuck closed.
2879 (ISM)Aftertreatment Fuel Drain Valve - Data Erratic, Intermittent, or Incorrect. An internal or external fuel leak has been detected in the aftertreatment fuel system.
2879 (ISX)Aftertreatment Fuel Drain Valve - Data Erratic, Intermittent, or Incorrect. An internal or external fuel leak has been detected in the aftertreatment fuel system.
288SAE J1939 Multiplexing Remote Accelerator Pedal or Lever Position Sensor System - Received Network Data In Error. The OEM vehicle electronic control unit (VECU) detected a fault with the remote accelerator.
2881Aftertreatment Fuel Pressure Sensor - Data Valid but Below Normal Operational Range - Least Severe Level. Low fuel pressure has been detected in the aftertreatment fuel system.
289Vehicle Accessory Shutdown Driver- Not Identifiable
291Proprietary Datalink Error (OEM/Vehicle Datalink) — Abnormal Update Rate. The ECM cannot communicate with the immobilizer anti-theft system.
292Auxiliary Temperature Sensor Input 1 - Special Instructions.
293Auxiliary Temperature Sensor Input 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the OEM auxiliary temperature circuit.
294Auxiliary Temperature Sensor Input 1 Circuit - Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at OEM auxiliary temperature circuit.
295Barometric Pressure —Data Erratic, Intermittent, or Incorrect. The barometric air pressure sensor is reading an erratic value at initial key-on.
295 (BCL)Barometric Pressure- Data Erratic, Intermittent, or Incorrect
295 ISXBarometric Pressure - Data Erratic, Intermittent or Incorrect
295 (X)Barometric Pressure- Data Erratic, Intermittent, or Incorrect
296OEM pressure signal at pin 48 of the OEM harness indicates pressure outside the engine protection limit
2961Exhaust Gas Recirculation Temperature - Data Valid But Above Normal Operating Range - Least Severe Level. Exhaust gas recirculation (EGR) temperature has exceeded the engine protection limit.
2962Exhaust Gas Recirculation Temperature - Data Valid But Above Normal Operating Range - Moderately Severe Level. Exhaust gas recirculation (EGR) temperature has exceeded the engine protection limit.

Looking for a different Cummins code?Search the full fault-code database, or hand the code to the AI assistant for a plain-English explanation.

Fault code lists by brand

Safety-critical: confirm before use

Safety first: park on level ground, stop the engine, and secure the machine before any inspection. Thresholds, component locations, wire numbers, fuse locations, and reset procedures can vary by model, configuration, and serial number. Confirm them in the service documentation for your exact machine.