CUMMINS ISX Engine Fault Codes DTC

Cummins ISX Engine Fault Codes 111-500

111 Electronic Control Module Critical Internal Failure – Bad Intelligent Device or Component

115 Engine Magnetic Speed / Position Lost Both of Two Signals – Data Erratic, Intermittent, or Incorrect

122 Intake Manifold 1 Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source

123 Intake Manifold 1 Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

125 Intake Manifold 1 Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level

131 Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

132 Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source

133 Remote Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

134 Remote Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Below Normal, or Shorted to Low Source

135 Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Above Normal, or Shorted to High Source

141 Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

143 Engine Oil Rifle Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level

144 Engine Coolant Temperature 1 Sensor Circuit – Voltage Above Normal, or Shorted to High Source

145 Engine Coolant Temperature 1 Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

146 Engine Coolant Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level

151 Engine Coolant Temperature – Data Valid but Above Normal Operational Range – Most Severe Level

153 Intake Manifold 1 Temperature Sensor Circuit – Voltage Above Normal, or Shorted to High Source

154 Intake Manifold 1 Temperature Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

155 Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Most Severe Level

187 Sensor Supply 2 Circuit Choice

187ism Sensor Supply 2 Circuit – Voltage Below Normal, or Shorted to Low Source

187isx Sensor Supply 2 Circuit – Voltage Below Normal, or Shorted to Low Source

195 Coolant Level Sensor 1 Circuit Choice

195-2wire Coolant Level Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

195-3wire Coolant Level Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

196 Coolant Level Sensor 1 Circuit Choice

196-2wire Coolant Level Sensor 1 Circuit – Voltage Below Normal, or Shorted to Low Source

196-3wire Coolant Level Sensor 1 Circuit – Voltage Below Normal, or Shorted to Low Source

197 Coolant Level – Data Valid but Below Normal Operational Range – Moderately Severe Level

212 Engine Oil Temperature Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

213 Engine Oil Temperature Sensor 1 Circuit — Voltage Below Normal, or Shorted to Low Source

214 Engine Oil Temperature High – Data Valid but Above Normal Operational Range – Most Severe Level

221 Barometric Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source

222 Barometric Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

227 Sensor Supply 2 Circuit – Voltage Above Normal, or Shorted to High Source

234 Engine Crankshaft Speed/Position – Data Valid but Above Normal Operational Range – Most Severe Level

238 Sensor Supply 3 Circuit – Voltage Below Normal, or Shorted to Low Source

241 Wheel-Based Vehicle Speed – Data Erratic, Intermittent or Incorrect

242 Wheel-Based Vehicle Speed Sensor Circuit Tampering Has Been Detected – Abnormal Rate of Change

245 Fan Control Circuit – Voltage Below Normal or Shorted to Low Source

249 Ambient Air Temperature Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

254 Engine Fuel Shutoff Valve Driver Circuit – Voltage Below Normal, or Shorted to Low Source

255 Engine Fuel Shutoff Valve Driver Circuit – Voltage Above Normal, or Shorted to High Source

256 Ambient Air Temperature Sensor 1 Circuit – Voltage Below Normal, or Shorted to Low Source

257 Engine Fuel shutoff Valve Driver – Mechanical System Not Responding Properly or Out of Adjustment

263 Engine Fuel Temperature Sensor 1 Circuit – Voltage Above Normal, or Shorted to High Source

265 Engine Fuel Temperature Sensor 1 Circuit – Voltage Below Normal, or Shorted to Low Source

285 SAE J1939 Multiplexing PGN Timeout Error – Abnormal Update Rate

286 SAE J1939 Multiplexing Configuration Error – Out of Calibration

287 SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System – Received Network Data In Error

288 SAE J1939 Multiplexing Remote Accelerator Pedal or Lever Position Sensor System – Received Network Data In Error

295 Barometric Pressure – Data Erratic, Intermittent, or Incorrect

311 Injector Solenoid Driver Cylinder 1 Circuit – Current Above Normal, or Grounded Circuit

312 Injector Solenoid Driver Cylinder 5 Circuit – Current Above Normal, or Grounded Circuit

313 Injector Solenoid Driver Cylinder 3 Circuit – Current Above Normal, or Grounded Circuit

314 Injector Solenoid Driver Cylinder 6 Circuit – Current Above Normal, or Grounded Circuit

315 Injector Solenoid Driver Cylinder 2 Circuit – Current Above Normal, or Grounded Circuit

319 Real Time Clock Power Interrupt – Data Erratic, Intermittent, or Incorrect

321 Injector Solenoid Driver Cylinder 4 Circuit – Current Above Normal, or Grounded Circuit

322 Injector Solenoid Driver Cylinder 1 Circuit – Current Below Normal, or Open Circuit

323 Injector Solenoid Driver Cylinder 5 Circuit – Current Below Normal, or Open Circuit

324 Injector Solenoid Driver Cylinder 3 Circuit – Current Below Normal, or Open Circuit

325 Injector Solenoid Driver Cylinder 6 Circuit – Current Below Normal, or Open Circuit

331 Injector Solenoid Driver Cylinder 2 Circuit – Current Below Normal, or Open Circuit

332 Injector Solenoid Driver Cylinder 4 Circuit – Current Below Normal, or Open Circuit

338 Idle Shutdown Vehicle Accessories Relay Driver Circuit – Voltage Above Normal, or Shorted to High Source

339 Idle Shutdown Vehicle Accessories Relay Driver Circuit – Voltage Below Normal, or Shorted to Low Source

343 Engine Control Module Warning Internal Hardware Failure – Bad Intelligent Device or Component

346 Engine Control Module Calibration Memory Software – Bad Intelligent Device or Component

351 Injector Power Supply – Bad Intelligent Device or Component

352 Sensor Supply 1 Circuit – Voltage Below Normal, or Shorted to Low Source

386 Sensor Supply 1 Circuit – Voltage Above Normal, or Shorted to High Source

415 Engine Oil Rifle Pressure – Data Valid but Below Normal Operational Range – Most Severe Level

418 Water in Fuel Indicator – Data Valid but Above Normal Operational Range – Least Severe Level

427 SAE J1939 Datalink – Abnormal Update Rate

428 Water-in-Fuel Indicator Sensor Circuit – Voltage Above Normal, or Shorted to High Source

429 Water-in-Fuel Indicator Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

435 Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect

441 Battery 1 Voltage – Data Valid but Below Normal Operational Range – Moderately Severe Level

442 Battery 1 Voltage – Data Valid but Above Normal Operational Range – Moderately Severe Level

 

Cummins ISX Codes 500-1000

546 Fuel Delivery Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source

547 Fuel Delivery Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

555 Crankcase Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

556 Crankcase Pressure — Data Valid but Above Normal Operational Range — Most Severe Level

584 Starter Relay Driver Circuit – Voltage Above Normal, or Shorted to High Source

585 Starter Relay Driver Circuit – Voltage Below Normal, or Shorted to Low Source

596 Electrical Charging System Voltage – Data Valid but Above Normal Operational Range – Moderately Severe Level

597 Electrical Charging System Voltage – Data Valid but Below Normal Operational Range – Moderately Severe Level

598 Electrical Charging System Voltage – Data Valid but Below Normal Operational Range – Most Severe Level

649 Engine Oil Change Interval – Condition Exists

686 Turbocharger 1 Speed – Data Erratic, Intermittent, or Incorrect

687 Turbocharger 1 Speed – Data Valid but Below Normal Operational Range – Moderately Severe Level

689 Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect

689ism Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect

689isx Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect

691 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Above Normal, or Shorted to High Source

692 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

697 ECM Internal Temperature Sensor Circuit – Voltage Above Normal, or Shorted to High Source

698 ECM Internal Temperature Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

731 Engine Speed / Position Camshaft and Crankshaft Misalignment – Mechanical System Not Responding Properly or Out of Adjustment

778 Engine Camshaft Speed/Position Sensor Choice

778ism Engine Camshaft Speed/Position Sensor – Data Erratic, Intermittent, or Incorrect

778isx Engine Camshaft Speed/Position Sensor – Data Erratic, Intermittent, or Incorrect

784 Adaptive Cruise Control Mode – Data Erratic, Intermittent, or Incorrect

 

Cummins ISX Codes 1000-1300

1117 Power Supply Lost With Ignition On – Data Erratic, Intermittent, or Incorrect

1239 Accelerator Pedal or Lever Position Sensor 2 Circuit – Voltage Above Normal, or Shorted to High Source

1241 Accelerator Pedal or Lever Position Sensor 2 Circuit – Voltage Below Normal, or Shorted to Low Source

1242 Accelerator Pedal or Lever Position Sensor 1 and 2 – Data Erratic, Intermittent, or Incorrect

 

Cummins ISX Codes 1300-1700

1663 Catalyst Inlet Temperature Sensor Swapped with Outlet – Condition Exists

1664 Catalyst Missing – Condition Exists

1665 Aftertreatment Exhaust Gas Temperature 1 Circuit – Voltage Below Normal, or Shorted to Low Source

1666 Aftertreatment Exhaust Gas Temperature 1 Circuit – Voltage Above Normal, or Shorted to High Source

1667 Aftertreatment Exhaust Gas Temperature 1 – Data Erratic, Intermittent, or Incorrect

1674 Aftertreatment Exhaust Gas Temperature 2 Circuit – Voltage Below Normal, or Shorted to Low Source

1675 Aftertreatment Exhaust Gas Temperature 2 Circuit – Voltage Above Normal, or Shorted to High Source

1676 Aftertreatment Exhaust Gas Temperature 2 – Data Erratic, Intermittent, or Incorrect

1691 Catalyst Efficiency – Out of Calibration

1695 Sensor Supply 5 – Voltage Above Normal, or Shorted to High Source

1696 Sensor Supply 5 – Voltage Below Normal, or Shorted to Low Source

 

Cummins ISX Codes 1700-1900

1843 Crankcase Pressure Circuit – Voltage Above Normal, or Shorted to High Source

1844 Crankcase Pressure Circuit – Voltage Below Normal, or Shorted to Low Source

1866 Exhaust Gas Recirculation Valve Delta Pressure – Data Erratic, Intermittent, or Incorrect

1876 Aftertreatment Exhaust Gas Temperature 3 Circuit – Voltage Above Normal, or Shorted to High Source

1877 Aftertreatment Exhaust Gas Temperature 3 Circuit – Voltage Below Normal, or Shorted to Low Source

1878 Aftertreatment Exhaust Gas Temperature 3 – Data Erratic, Intermittent, or Incorrect

1879 Aftertreatment Particulate Filter Differential Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source

1881 Aftertreatment Particulate Filter Differential Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

1883 Aftertreatment Particulate Filter Differential Pressure Sensor – Data Erratic, Intermittent, or Incorrect

1893 EGR Valve Control Circuit – Abnormal Update Rate

1895 EGR Valve Controller – Bad Intelligent Device or Component

1896 EGR Valve Controller – Out of Calibration

1899 Exhaust Gas Recirculation Valve Delta Pressure – Data Valid but Above Normal Operational Range- Moderately Severe Level

 

Cummins ISX Codes 1900-2000

1921 Aftertreatment Particulate Filter Differential Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

1922 Aftertreatment Particulate Filter Differential Pressure – Data Valid but Above Normal Operational Range – Most Severe Level

1923 Aftertreatment Fuel shutoff Valve 1 Circuit – Voltage Above Normal, or Shorted to High Source

1924 Aftertreatment Fuel Shutoff Valve 1 Circuit – Voltage Below Normal, or Shorted to Low Source

1925 Aftertreatment Fuel Shutoff Valve 1 – Data Erratic, Intermittent, or Incorrect

1926 Aftertreatment Fuel Pressure Sensor – Data Erratic, Intermittent, or Incorrect

1927 Aftertreatment Fuel Pressure Sensor – Voltage Above Normal, or Shorted to High Source

1928 Aftertreatment Fuel Pressure Sensor – Voltage Below Normal, or Shorted to Low Source

1932 Aftertreatment Fuel Injector 1 – Data Erratic, Intermittent, or Incorrect

1933 ECU Power Output Supply Voltage 2 – Data Valid but Above Normal Operational Range – Moderately Severe Level

1934 ECU Power Output Supply Voltage 2 – Data Valid but Below Normal Operational Range – Moderately Severe Level

1935 EGR Actuator Driver Circuit – Root Cause Not Known

1938 ECU Power Output Supply Voltage 1 – Data Valid but Below Normal Operational Range – Moderately Severe Level

1942 Crankcase Pressure – Data Erratic, Intermittent, or Incorrect

1943 Ambient Air Density – Data Valid but Below Normal Operational Range – Least Severe Level

1961 EGR Valve Control Circuit Calculated Over Temperature – Data Valid but Above Normal Operational Range – Least Severe Level

1962 VGT Actuator Driver Over Temperature (Calculated – Data Valid but Above Normal Operational Range – Least Severe Level

1963 Aftertreatment Fuel Shutoff Valve 1 – Mechanical System Not Responding Properly or Out of Adjustment

1966 Aftertreatment Exhaust Gas Temperature 1 – Data Valid but Above Normal Operational Range – Most Severe Level

1968 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Above Normal Operational Range – Moderately Severe Level

1969 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Above Normal Operational Range – Most Severe Level

1972 Aftertreatment Exhaust Gas Temperature 3 – Data Valid but Above Normal Operational Range – Moderately Severe Level

1973 Aftertreatment Exhaust Gas Temperature 3 – Data Valid but Above Normal Operational Range – Most Severe Level

1974 Crankcase Pressure – Data Valid but Above Normal Operational Range – Least Severe Level

1977 Aftertreatment Fuel Injector 1 Circuit – Current Below Normal, or Open Circuit

1981 Aftertreatment Particulate Filter Differential Pressure – Data Valid but Above Normal Operational Range – Least Severe Level

1993 Aftertreatment Particulate Filter Missing – Condition Exists

 

Cummins ISX Codes 2000-2200

2182 Engine Brake Actuator Driver 1 Circuit – Voltage Above Normal, or Shorted to High Source

2183 Engine Brake Actuator Driver 1 Circuit – Voltage Below Normal, or Shorted to Low Source

2185 Sensor Supply 4 Circuit — Voltage Above Normal, or Shorted to High Source

2186 Sensor Supply 4 Circuit – Voltage Below Normal, or Shorted to Low Source

2195 Auxiliary Equipment Sensor Input 3 Engine Protection Critical – Special Instructions

2198 VGT Actuator Driver Circuit – Root Cause Not Known

 

Cummins ISX Codes 2200-2400

2215 Fuel Pump Delivery Pressure — Data Valid but Below Normal Operational Range — Moderately Severe Level

2216 Fuel Pump Delivery Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2272 EGR Valve Position Circuit – Voltage Below Normal, or Shorted to Low Source

2273 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source

2274 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

2288 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level

2311 Electronic Fuel Injection Control Valve Circuit — Condition Exists

2312 Timing Actuator Driver Circuit – Condition Exists

2313 Fuel Control Valve Solenoid Driver 2 Circuit – Condition Exists

2314 Engine Timing Actuator Driver 2 Circuit Error – Condition Exists

2321 Engine Crankshaft Speed/Position — Data Erratic, Intermittent, or Incorrect

2322 Engine Camshaft Speed/Position Sensor — Data Erratic, Intermittent, or Incorrect

2345 Turbocharger 1 Speed – Abnormal Rate of Change

2346 Turbocharger Turbine Inlet Temperature (Calculated – Data Valid but Above Normal Operational Range – Least Severe Level)

2347 Turbocharger Compressor Outlet Temperature (Calculated – Data Valid but Above Normal Operational Range – Least Severe Level)

2349 EGR Valve Control Circuit – Current Below Normal, or Open Circuit

2351 EGR Valve Control Circuit – Voltage Below Normal, or Shorted to Low Source

2357 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment

2359 Exhaust Gas Recirculation Valve Delta Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2363 Engine Brake Actuator Driver Output 2 Circuit Choice

2363ism Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal, or Shorted to Low Source

2363isx Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal, or Shorted to Low Source

2365 Engine Brake Actuator Driver Output 3 Circuit – Voltage Below Normal, or Shorted to Low Source

2367 Engine Brake Actuator Driver Output 2 Circuit Choice

2367ism Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal, or Shorted to High Source

2367isx Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal, or Shorted to High Source

2368 Engine Brake Actuator Driver Output 3 Circuit – Voltage Above Normal, or Shorted to High Source

2372 Fuel Filter Differential Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2373 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source

2374 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

2375 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal, or Shorted to High Source

2376 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal, or Shorted to Low Source

2377 Fan Control Circuit — Voltage Above Normal, or Shorted to High Source

2387 VGT Actuator Driver Circuit (Motor – Mechanical System Not Responding Properly, or Out of Adjustment

 

Cummins ISX Codes 2400-2600

2412 Fan Speed – Data Erratic, Intermittent, or Incorrect

2448 Coolant Level – Data Valid but Below Normal Operational Range – Least Severe Level

2449 VGT Actuator Controller – Out of Calibration

2451 Turbocharger Turbine Inlet Temperature (Calculated – Data Valid but Above Normal Operational Range – Moderately Severe Level

2551 Injector Metering Rail 2 Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2552 Injector Metering Rail 1 Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2554 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect

 

Cummins ISX Codes 2600-2800

2634 VGT Actuator Controller – Bad Intelligent Device or Component

2635 VGT Actuator Driver Circuit – Condition Exists

2636 VGT Actuator Driver Circuit – Abnormal Update Rate

2637 Catalyst Face Plugged – Root Cause Not Known

2638 Catalyst Efficiency – Out of Calibration

2639 Aftertreatment Particulate Filter Differential Pressure – Data Valid but Above Normal Operational Range – Least Severe Level

2646 Engine Coolant Temperature – Condition Exists

2659 Engine Coolant Temperature – Condition Exists

2728 Aftertreatment Fuel Injector 1 – Data Valid but Above Normal Operational Range – Moderately Severe Level

2732 Aftertreatment Fuel Drain Valve Circuit – Voltage Above Normal or Shorted to High Source

2733 Aftertreatment Fuel Drain Valve Circuit – Voltage Below Normal or Shorted to Low Source

2738 Start Enable Device 1 Circuit (Ether Injection – Voltage Above Normal or Shorted to High Source

2739 Start Enable Device 1 Circuit (Ether Injection – Voltage Below Normal or Shorted to Low Source

2741 Aftertreatment Fuel Shutoff Valve 1 Swapped – Condition Exists

2742 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operational Range – Least Severe Level

2743 Aftertreatment Exhaust Gas Temperature 2 – Data Valid but Below Normal Operational Range – Moderately Severe Level

2754 Engine Particulate Filter Inlet Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2764 Exhaust Gas Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level

2774 Engine Exhaust Gas Recirculation (EGR System – Condition Exists

2777 Particulate Trap Active Regeneration Inhibited Due to Inhibit Switch – Condition Exists

2789 Engine Coolant Temperature – Data Valid but Below Normal Operational Range – Moderately Severe Level

 

Cummins ISX Codes 2800-3000

2813 EGR Valve Control – Special Instructions

2878 Aftertreatment Fuel Drain Valve – Mechanical System Not Responding Properly or Out of Adjustment

2879 Aftertreatment Fuel Drain Valve – Data Erratic, Intermittent, or Incorrect

2881 Aftertreatment Fuel Pressure Sensor – Data Valid but Below Normal Operational Range – Least Severe Level

2961 Exhaust Gas Recirculation Temperature – Data Valid but Above Normal Operational Range – Least Severe Level

2962 Exhaust Gas Recirculation Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level

2963 Engine Coolant Temperature — Data Valid but Above Normal Operational Range — Least Severe Level

2964 Intake Manifold 1 Temperature — Data Valid but Above Normal Operational Range — Least Severe Level

2973 Intake Manifold 1 Pressure – Data Erratic, Intermittent, or Incorrect