Cummins ISX Overview
Cummins ISX Fault Codes
Fault Code 111
Electronic Control Module Critical Internal Failure. Bad Intelligent Device or Component.
Fault Code 115
Engine Magnetic Speed/Position Lost Both of Two Signals – Data Erratic, Intermittent, or Incorrect.
Fault Code 122
Intake Manifold 1 Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 123
Intake Manifold 1 Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 124
Intake Manifold 1 Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level.
Fault Code 131
Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 132
Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 133
Remote Accelerator Pedal or Lever Position 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 134
Remote Accelerator Pedal or Lever Position 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 135
Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 141
Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 143
Engine Oil Rifle Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level.
Fault Code 144
Engine Coolant Temperature 1 Sensor Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 145
Engine Coolant Temperature 1 Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 151
Engine Coolant Temperature – Data Valid But Above Normal Operational Range – Most Severe Level.
Fault Code 153
Intake Manifold 1 Temperature Sensor Circuit – Voltage Above normal or Shorted to High Source.
Fault Code 154
Intake Manifold 1 Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 155
Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Most Severe Level.
Fault Code 195-2wire
Coolant Level Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 195-3wire
Coolant Level Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 196-2wire
Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 196-3wire
Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 197
Coolant Level – Data Valid but Below Normal Operating Range – Moderately Severe Level.
Fault Code 221
Barometric Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 222
Barometric Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 234
Engine Crankshaft Speed/Position – Data Valid but Above Normal Operational Range – Most Severe Level.
Fault Code 238
Sensor Supply 3 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 239
Sensor Supply 3 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 241
Wheel-Based Vehicle Speed – Data Erratic, Intermittent, or Incorrect.
Fault Code 245
Fan Control Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 249
Ambient Air Temperature Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 252
Engine Oil Level – Data Erratic, Intermittent, or Incorrect.
Fault Code 253
Engine Oil Level – Data Valid but Below Normal Operational Range – Most Severe Level.
Fault Code 256
Ambient Air Temperature Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 271
Fuel Pump Pressurizing Assembly 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 272
Fuel Pump Pressurizing Assembly 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 281
Fuel Pump Pressurizing Assembly 1 – Mechanical System Not Responding Properly or Out of Adjustment.
Fault Code 285
SAE J1939 Multiplexing PGN Timeout Error – Abnormal Update Rate.
Fault Code 286
SAE J1939 Multiplexing Configuration Error – Out of Calibration.
Fault Code 287
SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System – Received Network Data in Error.
Fault Code 288
SAE J1939 Multiplexing Remote Accelerator Pedal or Lever Position Sensor System – Received Network Data in Error.
Fault Code 292
Auxiliary Temperature Sensor Input 1 – Special Instructions
Faulty Code 293
Auxiliary Temperature Sensor Input 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 294
Auxiliary Temperature Sensor Input 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 295
Barometric Pressure – Data Erratic, Intermittent, or Incorrect.
Fault Code 296
Auxiliary Pressure Sensor Input 1 – Special Instructions
Fault Code 297
Auxiliary Pressure Sensor Input 1 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 298
Auxiliary Pressure Sensor Input 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 322
Injector Solenoid Driver Cylinder 1 Circuit – Current Below Normal or Open Circuit.
Fault Code 323
Injector Solenoid Driver Cylinder 5 Circuit – Current Below Normal or Open Circuit.
Fault Code 324
Injector Solenoid Driver 3 Circuit – Current Below Normal or Open Circuit.
Fault Code 325
Injector Solenoid Driver Cylinder 6 Circuit – Current Below Normal or Open Circuit.
Fault Code 331
Injector Solenoid Driver Cylinder 2 Circuit – Current Below Normal or Open Circuit.
Fault Code 332
Injector Solenoid Driver Cylinder 4 Circuit – Current Below Normal or Open Circuit.
Fault Code 334
Engine Coolant Temperature – Data Erratic, Intermittent, or Incorrect.
Fault Code 343
Engine Coolant Temperature – Data erratic, Intermittent, or Incorrect.
Fault Code 351
Injector Power Supply – Bad Intelligent Device or Component.
Fault Code 352
Sensor Supply 1 Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 386
Sensor Supply 1 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 415
Engine Oil Rifle Pressure Data Valid but Below Normal Operating Level.
Fault Code 418
Water-In-Fuel Indicator – Data Valid but Above Normal Operating Range.
Fault Code 427
SAE J1939 Datalink – Abnormal Update Rate.
Fault Code 428
Water-In-Fuel Indicator Sensor Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 429
Water-In-Fuel Indicator Sensor Circtui – Voltage Below Normal or Shorted to Low Source.
Fault Code 431
Acceleration Pedal or Lever Idle Validation Circuit – Data Erratic, Intermittent, or Incorrect.
Fault Code 432
Accelerator Pedal or Lever Idle Validation Circuit – Out of Calibration.
Fault Code 435b
Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect.
Fault Code 435cl
Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect.
Fault Code 441
Battery 1 Voltage – Data Valid but Below Normal Operational Range – Moderately Severe Level
Fault Code 442
Battery 1 Voltage – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 449b
Injector Metering Rail Number 1 Pressure – Data Valid but Above Normal Operating Range – Most Severe Level
Fault Code 449cl
Injector Metering Rail Number 1 Pressure – Data Valid but Above Normal Operating Range – Most Severe Level
Fault Code 451
Injector Metering Rail Number 1 Pressure Sensor Circuit – Voltage Above Normal or Shorted to High.
Fault Code 452
Injector Metering Rail Number 1 Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low.
Fault Code 471
Engine Oil Level – Data Valid but Below Normal Operational Range – Least Sever Level
Fault Code 488
Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 499
Engine Oil Level Sensor Circuit – Voltage below normal or shorted to low source.
Fault Code 528
Auxiliary Alternate Torque Validation Switch – Data Erratic, Intermittent, or Incorrect.
Fault Code 529
Auxiliary Input/Output 3 Circuit – Voltage Above Normal or Shorted to High Source.
Fault Code 553b
Injector Metering Rail Number 1 Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
Fault Code 553cl
Injector Metering Rail Number 1 Pressure – Data Valid but Above Normal Operating Range – Moderately Severe Level
Fault Code 554
Injector Metering Rail 1 Pressure – Data Erratic, Intermittent, or Incorrect.
Fault Code 555b
Crankcase Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level.
Fault Code 555cl
Crankcase Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level.
Fault Code 556b
Crankcase Pressure – Data Valid but Above Normal Operational Range – Most Severe
Fault Code 556cl
Crankcase Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level
Fault Code 559b
Injector Metering rail 1 pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level
Fault Code 559cl
Injector Metering Rail 1 Pressure – Data Valid but Below Normal Operating range – Moderately Severe Level
Fault Code 584
Starter Relay Driver Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 585
Starter Relay Driver Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 596
Electrical Charging System Voltage – Data Valid but Above Normal Operating Range – Moderately Severe Level
Fault Code 597
Electrical Charging System Voltage – Data Valid but Below Normal Operating Range – Moderately Severe Level
Fault Code 598
Electrical Charging System Voltage – Data Valid but Below Normal Operating range – Most Severe Level
Fault Code 599
Auxiliary Commanded Dual Output Shutdown – Special Instructions
Fault Code 649
Engine Oil Change Interval – Condition Exists
Fault Code 686
Turbocharger 1 Speed – Data Erratic, Intermittent, or Incorrect
Fault Code 687 Turbocharger 1 Speed – Data Valid but Below Normal Operating Range – Moderately Severe Level
Fault Code 688
Engine Oil Level – Data Valid but Above Normal Operational Range – Most Severe Level
Fault Code 689
Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect
Fault Code 691
Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Above Normal or Shorted to Low
Fault Code 692
Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low
Fault Code 698
ECM Internal Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source.
Fault Code 731
Engine Speed/Position Camshaft and Crankshaft Misalignment – Mechanical System Not Responding or Out of Adjustment
Fault Code 778
Engine Camshaft Speed/ Position – Data Erratic, Intermittent, or Incorrect.
Fault Code 784
Adaptive Cruise Control Mode – Data Erratic, Intermittent, or Incorrect
Fault Code 1117
Power Supply Lost With Ignition On – Data Erratic, Intermittent, or Incorrect.
Fault Code 1239
Accelerator Pedal or Lever Position Sensor 2 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 1241
Accelerator Pedal or Lever Position Sensor 2 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 1242
Accelerator Pedal or Lever Position Sensor 1 and 2 – Data Erratic Intermittent, or Incorrect
Fault Code 1663
Catalyst Inlet Temperature Sensor Swapped with Outlet – Condition Exists
Fault Code 1664
Catalyst Missing – Condition Exists
Fault Code 1665
Aftertreatment Exhaust Gas Temperature 1 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 1666
Aftertreatment Exhaust Gas Temperature 1 Circuit – Voltage Above Normal or Shorted to High
Fault Code 1667
Aftertreatment Exhaust Gas Temperature 1 – Data Erratic, Intermittent, or Incorrect
Fault Code 1674
Aftertreatment Exhaust Gas Temperature 2 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 1675
Aftertreatment Exhaust Gas Temperature 2 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 1676
Aftertreatment Exhaust Gas Temperature 2 – Data Erratic, Intermittent, or Incorrect
Fault Code 1691
Catalyst Efficiency – Out of Calibration
Fault Code 1695
Sensor Supply 5 – Voltage Above Normal or Shorted to High Source
Fault Code 1843
Crankcase Pressure Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 1844
Crankcase Pressure Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 1866
Exhaust Gas Recirculation Valve Delta Pressure – Data Erratic, Intermittent, or Incorrect
Fault Code 1876
Aftertreatment Exhaust Gas Temperature 3 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 1877 Aftertreatment Exhaust gas Temperature 3 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 1878
Aftertreatment Exhaust gas temperature 3 – Data Erratic, Intermittent, or Incorrect
Fault Code 1879
Aftertreatment Pariculate Filter Differential Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 1881
Aftertreatment Pariculate Filter Differential Pressure Sensor Circuit – Voltage Above Normal or Shorted to Low Source
Fault Code 1883
Aftertreatmment Diesel Particulate Filter Differential Pressure Sensor – Data Erratic, Intermittent, or Incorrect.
Fault Code 1896
EGR Valve Controller – Out of Calibration
Fault Code 1899
Exhaust Gas Recirculation Valve Delta Pressure – Data Valid But Below Normal Operating Range – Moderately Severe.
Fault Code 1911b
Injector Metering Rail Number 1 Pressure – Data Valid but Below Normal Operating Range – Moderately Severe Level
Fault Code 1911cl
Injector Metering Rail Number 1 Pressure – Data Valid but Above Normal Operating Range – Most Severe Level
Fault Code 1921
Aftertreatment Diesel particulate Filter Differential Pressure – Data Valid but Above Normal Operating Range – Moderately Severe Level
Fault Code 1938
ECU Power Output Supply Voltage 1 – Data Valid but Below Normal Operational Range – Moderately Severe Level
Fault Code 1942
Crankcase Pressure – Data Erratic, Intermittent, or Incorrect
Fault Code 1943
Ambient Air Density – Data Valid but Below Normal Operational Range – Lease Severe Level
Fault Code 1962
VGT Actuator Driver Over Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level
Fault Code 1966
Aftertreatment Exhaust Gas Temperature 1 – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 1968
Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 1969
Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Above Normal Operational Range – Most Severe
Fault Code 1972
Exhaust Gas Temperature 3 – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 1973
Exhaust Gas Temperature 3 – Data Valid but Above Normal Operational Range – Most Severe Level
Fault Code 1974
Crankcase Pressure – Data Valid but Above Normal Operational Range – Least Severe Level
Fault Code 1981
Aftertreatment Particulate Filter Differential Pressure – Data Valid but Above Normal Operating Range – Least Severe Level.
Fault Code 1993
Aftertreatment Particulate Trap Missing – Condition Exists
Fault Code 2182
Engine Brake Actuator Driver 1 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 2183
Engine Brake Actuator Circuit 1 – Voltage Below Normal or Shorted to Low Source
Fault Code 2186
Sensor Supply 4 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2185
Auxiliary Equipment Sensor Input 3 Engine Protection Critical – Special Instructions
Fault Code 2198
VGT Actuator Driver Circuit – Root Cause Not Known
Fault Code 2249
Injector Metering Rail 1 Pressure – Data Valid but Below Normal Operational Range – Moderately Severe
Fault Code 2265
Electric Lift Pump for Engine Fuel Supply Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 2272
EGR Valve Position Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2273
Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High
Fault Code 2274
Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low
Fault Code 2288
Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level
Fault Code 2311
Electronic Fuel Injection Control Valve Circuit – Condition Exists
Fault Code 2321
Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect
Fault Code 2322
Engine Camshaft Speed/Position Sensor – Data Erratic, Intermittent, or Incorrect
Fault Code 2345
Turbocharger 1 Speed – Abnormal Rate of Change
Fault Code 2346
Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Ranges – Moderately Severe Level
Fault Code 2347
Turbocharger Compressor Outlet Temperature (Calculated) – Data Valid but Above Normal Operational Ranges – Least Severe
Fault Code 2349
EGR Valve Control Circuit – Current Below Normal or Open Circuit
Fault Code 2351
EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2357
EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment
Fault Code 2359
Exhaust Gas Recirculation Valve Differential Pressure – Data Valid but Above Normal Operating Range
Fault Code 2363
Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2367
Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 2373
Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 2374
Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2375
Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to high Source
Fault Code 2376
Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2377
Fan Control Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 2387
Variable Geometry Turbocharger (VGT) Actuator Driver Circuit (Motor) – Mechanical System Not Responding Properly or Out of Adjustment
Fault Code 2448
Coolant Level – Data Valid but Below Normal Operational Range – Least Severe Level
Fault Code 2449
VGT Actuator Controller – Out of Calibration
Fault Code 2451
Turbocharger Turbine Inlet Temperature (calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 2554
Exhaust Gas Pressure – Data erratic, Intermittent, or Incorrect
Fault Code 2555
Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source
Fault Code 2556
Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source
Fault Code 2557
Auxiliary PWM Driver 1 – Voltage Above Normal or Shorted to high Source
Fault Code 2558
Auxiliary PWM Driver 1 – Voltage Below Normal or Shorted to Low Source
Fault Code 2634
VGT Actuator Controller – Bad Intelligent Device or Component
Fault Code 2637
Catalyst Face Plugged – Root Cause Not Known
Fault Code 2638
Catalyst Efficiency – Out of Calibration
Fault Code 2639
Aftertreatment Diesel Particulate Filter Differential Pressure – Data Valid but Above Normal Operating Ranges
Fault Code 2646
Engine Coolant Temperature – Condition Exists
Fault Code 2728
Aftertreatment Fuel Injector 1 – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 2742
Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operating Range – Least Severe Level
Fault Code 2473
Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operating Range – Moderately Severe Level
Fault Code 2754
Engine Particulate Filter Inlet Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 2765
Engine Injector Bank 1 Barcodes – Out of Calibration
Fault Code 2777
Particulate Trap Active Regeneration Inhibited Due to Permit Switch – Condition Exists
Fault Code 2778
Aftertreatment Fuel Rate – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 2813
EGR Valve Control – Special Instructions
Fault Code 2962
Exhaust Gas Recirculation Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level
Fault Code 2963
Engine Coolant Temperature – Data Valid but Above Normal Operational Range – Least Severe Level
Fault Code 2964
Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Least Severe Level
Fault Code 2973
Intake Manifold 1 Pressure – Data Erratic, Intermittent, or Incorrect
Fault Code 3616
Variable Geometry Turbocharger (VGT) Actuator Position – Special Instructions
Fault Code 3738
Air Supply Actuator – Data Valid but Below Normal Operating Range – Moderately Severe Level