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.

The exhaust gas pressure 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 become active.

Possible causes:

1)Signal wire shorted to sensor supply or battery voltage
2)Open return circuit in the engine harness, connectors, or sensor.

Possible repairs:

1)Replace the exhaust gas pressure sensor.
2)Repair or replace the engine harness.
3)Replace the ECM.

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.

Cummins ISB CM850 (2003-06) Fault Code: 2366 PID: SID 28 SPN: 1072 FMI: 3 Engine Brake Actuator Circuit #1 - Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 1 signal circuit.

Cummins ISB CM850 (2003-06) Fault Code: 2363 PID: SID 29 SPN: 1073 FMI: 4 Engine Brake Actuator Circuit #2 - Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.

Cummins ISB CM850 (2003-06) Fault Code: 2362 PID: SID 28 SPN: 1072 FMI: 4 Engine Brake Actuator Circuit #1 - Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 1 signal circuit.

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