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Cummins ISX CM870 (2003-06) Fault Code: 123 PID: P102 SPN: 102 FMI: 4/4 Intake Manifold 1 Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage or open circuit detected at the intake manifold pressure circuit
The intake manifold 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 be active. Before troubleshooting Fault Code 123, check for multiple faults.
Possible causes:
1)Signal circuit open or shorted to ground in the engine harness or sensor2)Supply line open or shorted to ground.3) ECM Harness/Connector4) ECM Failure
Possible repairs:
1)Replace the sensor.2)Repair or replace the engine harness.3)Replace the ECM.
Cummins ISX CM870 (2003-06) Fault Code: 122 PID: P102 SPN: 102 FMI: 3/3 Intake Manifold Pressure Sensor Circuit – shorted high. High signal voltage detected at the intake manifold pressure circuit.
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 111 PID: SID 254 SPN: 629 FMI: 12 Engine Control Module Critical Internal Failure- Bad Intelligent Device or Component
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 6595 PID: SPN: 190 FMI: 11 Engine Speed- Root Cause Not Known
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 6422 PID: SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit- Voltage Below Normal or Shorted to Low Source
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 6421 PID: SID 254 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit- Voltage Above Normal or Shorted to High Source
Cummins ISX11.9 CM2250 (2010-12) Fault Code: 6419 PID: SPN: 1072 FMI: 4 Engine Brake Actuator Driver 1 Circuit- Voltage Below Normal or Shorted to Low Source