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Cummins Fault Codes List ISX pre-DPF 2002-2006
Cummins ISX 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 Cummins Fault Codes List
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 Cummins Fault Codes List
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 Cummins Fault Codes List
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 Cummins Fault Codes List
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 Cummins Fault Codes List
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 Cummins Fault Codes List
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 Cummins Fault Codes List
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,
Cummins Fault Codes List Prior to 2002
111 Electronic Control Module (ECM Microprocessor
115 Camshaft Engine Position Sensor Circuit
121 Crankshaft Engine Position Sensor Circuit
122 Intake Manifold Pressure Sensor Circuit
123 Intake Manifold Pressure Sensor Circuit
131 Accelerator Position Sensor Circuit
132 Accelerator Position Sensor Circuit
133 Remote Throttle Position Sensor Circuit
134 Remote Throttle Position Sensor Circuit
135 Oil Pressure Sensor Circuit
141 Oil Pressure Sensor Circuit
143 Oil Pressure Sensor Circuit
144 Coolant Temperature Sensor Circuit
145 Coolant Temperature Sensor Circuit
147 Frequency Throttle Circuit
148 Frequency Throttle Circuit
153 Intake Manifold Temperature Sensor Circuit
154 Intake Manifold Temperature Sensor Circuit
187 Sensor Voltage Supply
198 ICON™ Lamp Circuit
199 ICON™ Lamp Circuit
212 Oil Temperature Sensor Circuit
213 Oil Temperature Sensor Circuit
216 Wet Tank Pressure Sensor Circuit
217 Wet Tank Pressure Sensor Circuit
218 Wet Tank Pressure Sensor Circuit
221 Ambient Air Pressure Sensor Circuit
222 Ambient Air Pressure Sensor Circuit
223 Burn Valve Solenoid
227 Sensor Voltage Supply
234 Engine Overspeed
235 Engine Coolant Level – Engine Protection
241 Vehicle Speed Sensor Circuit
242 Vehicle Speed Sensor Circuit
245 Engine Fan Clutch Supply Circuit
249 Ambient Air Temperature Sensor Circuit
254 Fuel Shutoff Valve Solenoid Supply Circuit
255 Fuel Shutoff Valve Solenoid Supply Circuit
256 Ambient Air Temperature Sensor Circuit
259 Fuel Shutoff Valve
284 Sensor Supply Voltage
285 J1939 Datalink Multiplexing
286 J1939 Datalink Multiplexing
293 OEM Temperature Sensor Circuit
294 OEM Temperature Sensor Circuit
295 Ambient Air Pressure Sensor
297 OEM Pressure Sensor Circuit
298 OEM Pressure Sensor Circuit
319 Real-Time Clock Power Circuit
338 Idle Shutdown Vehicle Accessory/Ignition Bus Relay Circuit
339 Idle Shutdown Vehicle Accessory/Ignition Bus Relay Circuit
341 Unswitched Battery Supply Circuit
343 Electronic Control Module (ECM
349 Auxiliary Speed Governor
352 Sensor Voltage Supply
359 ICON™ Idle Control System
378 Actuator Circuit
379 Actuator Circuit
386 Sensor Voltage Supply
387 Throttle Voltage Supply
388 Engine Brake Supply Circuit
392 Engine Brake Supply Circuit
393 Engine Brake Supply Circuit
394 Actuator Circuit
395 Actuator Circuit
396 Actuator Circuit
397 Actuator Circuit
398 Actuator Circuit
399 Actuator Circuit
415 Actuator Circuit
419 Intake Manifold Pressure Sensor
422 Coolant Level Sensor Circuit
426 J1939 Datalink Communication
428 Water-In-Fuel (WIF Sensor Circuit
429 Water-In-Fuel (WIF Sensor Circuit
431 Idle Validation Switch Choice
431iss Idle Validation Switch Circuit
431niss Idle Validation Switch Circuit
431sss Idle Validation Switch Circuit
432 Accelerator Pedal Circuit
433 Intake Manifold Pressure Circuit
434 Unswitched Battery Supply Circuit
435 Oil Pressure Sensor
441 Unswitched Battery Supply Circuit
442 Unswitched Battery Supply Circuit
443 Throttle Voltage Supply
449 High Fuel Pressure
451 Front Rail Pressure Sensor Circuit
452 Front Rail Pressure Sensor Circuit
465 Wastegate Actuator Number 1 Circuit
466 Wastegate Actuator Number 1 Circuit
469 ICON™ Cab Thermostat Circuit
472 Crankcase Oil Level Sensor Circuit
474 Starter Solenoid Lockout Relay Driver Circuit
475 Electronic Air Compressor Governor Circuit
476 Electronic Air Compressor Governor Circuit
482 Low Fuel Pressure
483 Rear Rail Pressure Sensor Circuit
484 Rear Rail Pressure Sensor Circuit
485 Rear Rail Pressure Sensor Circuit
486 Fuel System Underfueling
489 Auxiliary Speed Input Error
491 Wastegate Actuator Number 2 Circuit
492 Wastegate Actuator Number 2 Circuit
496 Sensor Supply Voltage
527 Switched Output A Error
528 Switched Output B Error
529 Switched Output B Error
536 Autoshift Low Gear Actuator (Lockout Solenoid Circuit
537 Autoshift High Gear Actuator (Shift Solenoid Circuit
538 Autoshift Neutral Actuator
541 ICON™ Starter Relay/Interlock Circuit
544 Top 2 Transmission Circuit – Mechanical System Failure
546 Fuel Pressure Sensor Circuit
547 Fuel Pressure Sensor Circuit
551 Idle Validation Switch Choice
551iss Idle Validation Switch Circuit
551ivs Idle Validation Switch Circuit
551sss Idle Validation Switch Circuit
553 Fuel System Overfueling
559 Fuel System Underfueling
581 Fuel Inlet Restriction Sensor Circuit
582 Fuel Inlet Restriction Sensor Circuit
583 Fuel Inlet Restriction Sensor Circuit
588 Engine Start Alarm Circuit
589 Engine Start Alarm Circuit
595 Turbocharger Speed High (Calculated
596 Voltage Monitor – High Voltage
597 Voltage Monitor – Low Voltage
598 Voltage Monitor – Very Low Voltage
731 Engine Speed Sensor and Camshaft Position Sensor – Mechanical Misalignment Between Camshaft and Crankshaft Sensors
753 Engine Speed Sensor Circuit
755 Fuel Injector
758 Fuel Injector
784 Adaptive Cruise Control Circuit
951 Cylinder Power Imbalance
For Cummins ISX fault codes on later models (2003 & up), use ISX Fault Codes (2003 & Later)
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