Cummins ISB CM850 (2003-06) Fault Code: 2381 PID: SPN: 2795 FMI: 4 Turbocharger position sensor circuit – shorted high. High signal voltage detected at the turbocharger position sensor circuit.
The turbocharger position sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active.
Possible causes:
1)Open return circuit in the harness, connectors, or sensor
2)Signal shorted to sensor supply or battery voltage
3)Failed ECM
4)Failed VGT position sensor.
Possible repairs:
1)Replace the turbocharger position sensor.
2)Repair or replace the engine harness.
3)Replace the ECM.
Cummins ISB CM850 (2003-06) Fault Code: 2377 PID: SID 33 SPN: 647 FMI: 3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2376 PID: 412 SPN: 412 FMI: 2 Recirculation Exhaust Gas (EGR) Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR temperature circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2375 PID: 412 SPN: 412 FMI: 3 EGR Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR temperature sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2374 PID: 95 SPN: 1209 FMI: 4 Exhaust gas pressure sensor circuit – shorted low. Low voltage detected on the exhaust gas pressure sensor exhaust circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2373 PID: 95 SPN: 1209 FMI: 3 Exhaust gas pressure sensor circuit – shorted high. High voltage detected at the exhaust gas pressure sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2367 PID: SID 29 SPN: 1072 FMI: 3 Engine Brake Actuator Circuit #2 – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.
