Cummins ISL CM850 (2003-06) Fault Code: 111 PID: SID 254 SPN: 629 FMI: 12 Engine Control Module - critical internal failure. Error internal to the ECM related to memory hardware failures or internal ECM voltage supply circuits.

This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.

Possible repairs:

1)Replace the ECM.

Cummins ISL CM850 (2003-06) Fault Code: FC0006 PID: SPN: FMI: Exhaust Gas Temperature Sensor Number 1 Circuit - Voltage Above Normal, or Shorted to High Source. High signal voltage or open circuit detected at the Exhaust Gas Temperature Sensor circuit.

Cummins ISL CM850 (2003-06) Fault Code: FC0005 PID: SPN: FMI: Exhaust Gas Temperature Sensor Number 1 Circuit - Voltage Below Normal, or Shorted to Low Source. Low signal voltage or open circuit detected at the Exhaust Gas Temperature Sensor circuit.

Cummins ISL CM850 (2003-06) Fault Code: FC0004 PID: SPN: FMI: Exhaust Gas Temperature Sensor Number 1 Circuit - Data Erratic, Intermittent, or Incorrect. The exhaust gas treatment monitor unit has detected that the exhaust gas temperature sensor number 1 is not changing.

Cummins ISL CM850 (2003-06) Fault Code: FC0003 PID: SPN: FMI: Exhaust Gas Pressure Sensor Number 1 Circuit - Data Erratic, Intermittent, or Incorrect. The exhaust gas treatment monitor unit has detected that the exhaust gas pressure sensor number 1 is not changing.

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