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 operation.
1)Faulty exhaust gas temperature 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 maintenance lamps will both flash four times in sequence to alert the operator that this condition exists. The engine diagnostic lamps will not illuminate.
1)Replace the exhaust gas temperature sensor.
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.
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.
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.
Cummins ISL CM850 (2003-06) Fault Code: 2976 PID: SPN: 3361 FMI: 2 Dosing Control Unit Temperature – Data Erratic, Intermittent, or Incorrect. An internal error has been detected in the catalyst dosing control unit.
Cummins ISL CM850 (2003-06) Fault Code: 2973 PID: 102 SPN: 102 FMI: 2 Intake Manifold Pressure Sensor Circuit – Data Erratic, Intermittent, or Incorrect. The electronic control module (ECM) has detected an intake manifold pressure signal that is too high or too low for present engine operating conditions.
Cummins ISL CM850 (2003-06) Fault Code: 2964 PID: 105 SPN: 105 FMI: 15 Intake Manifold Temperature High – Data Valid But Above Normal Operating Range – Least Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature above engine protection warning limit.
