The database covers 369 dealer codes — Cummins ISX uses its own factory format, outside the J1939 SPN/FMI standard. A few examples below; look up your own code in the search on the homepage, where you can also pick “Cummins ISX” from the brand list.
| 111 | Electronic Control Module Critical Internal Failure - Bad Intelligent Device or Component. Symptom: The engine may fail to start. |
| 196 | Coolant Level Sensor 1 Circuit Choice. Symptom: Performance is not affected. |
| 256 | Ambient Air Temperature Sensor 1 Circuit - Voltage Below Normal, or Shorted to Low Source |
| 338 | Idle Shutdown Vehicle Accessories Relay Driver Circuit - Voltage Above Normal, or Shorted to High Source |
| 426 | SAE J1939 Data Link - Communication Between the ECM and Another Device Lost. Symptom: Performance is not affected. Devices connected to the J1939 network may not work. |
| 485 | Fuel Pressure, Rear Three Cylinders - Data Valid but Above Normal Operational Range |
| 596 | Electrical Charging System Voltage - Data Valid but Above Normal Operational Range - Moderately Severe Level. Symptom: The amber warning lamp stays on until the voltage returns to normal |
| 1664 | Catalyst Missing - Condition Exists. Symptom: Reagent dosing into the catalytic converter is switched off. |
| 1922 | Aftertreatment Particulate Filter Differential Pressure - Data Valid but Above Normal Operational Range - Most Severe Level |
| 1993 | Aftertreatment Particulate Filter Missing - Condition Exists |
| 2348 | EGR Valve - Out of Calibration. Symptom: Power loss is possible. The power supply to the EGR valve motor is switched off. |
| 2412 | Fan Speed - Data Erratic, Intermittent, or Incorrect |
| 2774 | Engine Exhaust Gas Recirculation (EGR) System - Condition Exists |
| 689isx | Engine Crankshaft Speed/Position - Data Erratic, Intermittent, or Incorrect |
| U1005 | From aftertreatment system (DPF Test run information Proprietary B) - Message rate too high |
Know the code number? Type it into the search — or paste the whole list from the scanner and we will show which fault is the real one.