Cummins ISL & ISC Fault Codes:
A complete list of all fault codes for Cummins engines with CAPS fuel system.
Here are all the ISL and ISC fault codes available for the Cummins ECM. These Cummins trouble codes pertain to both models equipped with the CAPS fuel system.
ISC Fault Codes # 111-500
111 Electronic Control Module (ECM Microprocessor
115 Engine Speed Sensor (ESS Circuit
121 Engine Position Sensor Circuit
122 Intake Manifold Pressure Sensor Circuit
123 Intake Manifold Pressure Sensor Circuit
124 Intake Manifold Pressure - Engine Protection
131 Accelerator Position Sensor Circuit
132 Accelerator Position Sensor Circuit
133 Remote Throttle Position Sensor
134 Remote Throttle Position Sensor
135 Oil Pressure Sensor Circuit
141 Oil Pressure Sensor/Switch Circuit Choice
141sn Oil Pressure Sensor Circuit
141sw Oil Pressure Switch Circuit
143 Oil Pressure Sensor/Switch Circuit Choice
143sn Oil Pressure Sensor Circuit
143sw Oil Pressure Switch Circuit
144 Coolant Temperature Sensor Circuit
145 Coolant Temperature Sensor Circuit
146 Coolant Temperature - Engine Protection
147 Frequency Throttle Circuit
148 Frequency Throttle Circuit
151 Coolant Temperature - Engine Protection
153 Intake Manifold Air Temperature Sensor Circuit
154 Intake Manifold Air Temperature Sensor Circuit
184 OEM Pressure - Engine Protection
191 Air Conditioner Clutch Supply Circuit
221 Ambient Air Pressure Sensor Circuit
222 Ambient Air Pressure Sensor Circuit
234 Engine Overspeed Circuit
235 Engine Coolant Level - Engine Protection
241 Vehicle Speed Sensor Circuit
242 Vehicle Speed Sensor (VSS Circuit
243 Engine Brake Supply Choice
243isc Engine Brake Supply Circuit
243isl Engine Brake Supply Circuit
245 Engine Fan Clutch Supply Circuit
263 Fuel Temperature Sensor Circuit
265 Fuel Temperature Sensor Circuit
268 Fuel Pressure Sensor Circuit
271 Front Pumping Valve Circuit
272 Front Pumping Valve Circuit
273 Rear Pumping Valve Circuit
274 Rear Pumping Valve Circuit
275 Front Pumping Element
276 Injection Control Valve Stator Circuit
277 Injection Control Valve Stator Circuit
278 Lift Pump Circuit
279 Injection Control Valve Stator Circuit
281 Pumping Element
282 Pumping Element
283 Engine Speed Sensor
284 Engine Speed Sensor
285 J1939 Datalink Multiplexing
286 J1939 Datalink Multiplexing
296 OEM Pressure - Engine Protection
297 OEM Pressure Sensor Circuit
298 OEM Pressure Sensor Circuit
328 Rear Pumping Element
329 Fuel Injection Pump
349 Auxiliary Speed or Auxiliary Pressure Input Error
352 Sensor Supply Circuit
381 Intake Air Heater Relay Circuit
382 Intake Air Heater Relay Circuit
385 Remote Accelerator Control Circuit
387 Accelerator Position Sensor Circuit
415 Oil Pressure Sensor/Switch Circuit Choice
415sn Oil Pressure Sensor Circuit
415sw Oil Pressure Switch Circuit
418 Water-In-Fuel (WIF Sensor Circuit
422 Coolant Level Sensor Circuit
429 Water-In-Fuel (WIF Sensor Circuit
431 Idle Validation Switch (IVS Circuit
432 Accelerator Pedal Circuit (ISS
433 Intake Manifold Pressure Sensor Circuit
434 Unswitched Battery Supply Circuit
441 Unswitched Battery Supply Circuit
442 Unswitched Battery Supply Circuit
443 Accelerator Position Sensor Circuit
444 Remote Accelerator Control Circuit
449 Fuel Pressure Sensor Circuit
451 Fuel Pressure Sensor Circuit
452 Fuel Pressure Sensor Circuit
456 Fuel Pressure Sensor Circuit
488 Intake Manifold Air Temperature Sensor - Engine Protection Circuit
489 Auxiliary Speed or Auxiliary Pressure Input Error
493 Injection Control Valve Identifier Circuit
497 Primary/Secondary ECM Identification Error
ISC Fault Codes #515-2195
515 Coolant Level Sensor Circuit
516 Coolant Level Sensor Circuit
524 Switched Droop Selection Circuit
527 Dual Output Driver A
528 Alternate (Switched Torque Curve Switch Circuit
529 Dual Output Driver B
539 Transient Suppressor Circuit
768 Output Device Driver (Transmission Shift Modulator
779 OEM Input - Engine Protection
2194 Multiple Unit Synchronization Switch Error
2195 OEM Switch - Engine Protection
For Cummins trouble codes on later ISC and ISL models (2003 & up), use
HPCR Fault Codes
Go to All Cummins Fault Codes
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