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Cummins ISB CM850 (2003-06) Fault Code: FC0001 PID: SPN: FMI: Exhaust Gas Pressure Sensor Number 1 Circuit – Voltage Above Normal, or Shorted to High Source. High signal voltage detected at the Exhaust Gas Pressure Sensor circuit. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Signal circuit shorted to sensor supply or battery voltage.This fault code will only be present in the exhaust gas treatment monitor unit and will not be present in the engine electronic control module (ECM). The exhaust gas treatment fault code and maintenance lamps will both flash one time in sequence to alert the...

Cummins ISB CM850 (2003-06) Fault Code: FC0002 PID: SPN: FMI: Exhaust Gas Pressure Sensor Number 1 Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage or open circuit detected at the Exhaust Gas Pressure Sensor circuit. Possible causes: 1)Signal circuit open or shorted to ground in the exhaust gas treatment monitor harness or exhaust gas pressure sensor.2)Supply line open or shorted to ground.This fault code will only be present in the exhaust gas treatment monitor unit and will not be present in the engine electronic control module (ECM). The exhaust gas treatment fault code and maintenance...

Cummins ISB 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. This fault code is activated when the exhaust gas treatment monitor unit detects that the exhaust gas pressure signal value is not changing (ie, stuck in range). In order for this fault code to activate, the exhaust gas treatment monitor unit must detect that the exhaust gas pressure signal does not change during 30 minutes of engine operation...

Cummins ISB 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. This fault code is activated when the exhaust gas treatment monitor unit detects that the exhaust gas temperature signal value is not changing (ie, stuck in range). In order for this fault code to activate, the exhaust gas treatment monitor unit must detect that the exhaust gas temperature is below 100?C [212?F] during one hour of continuous engine...

Cummins ISB 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. Possible causes: 1)Signal shorted to ground2)Signal shorted to return or ground in the sensor3)Open circuit on the signal wire4)Open return circuit in the harness, connector, or sensor. This fault code will only be present in the exhaust gas treatment monitor unit and will not be present in the engine electronic control module (ECM). The exhaust gas treatment fault code and...