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Cummins ISM CM875 (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 ISM CM875 (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 ISX CM870 (2003-06) Fault Codes: 111 PID: SID 254 SPN: 629 FMI: 12 Engine Control Module Critical Internal Failure – Bad Intelligent Device or Component. Error internal to the engine control module (ECM) related to memory hardware malfunctions or internal ECM voltage supply circuits.
Cummins ISX CM870 (2003-06) Fault Code: 9121 PID: S146 SPN: 2791 FMI: 0/15 EGR Valve Actuator Over Temperature (Calculated) – Data Above Normal Range – least severe level.
Cummins ISX CM870 (2003-06) Fault Code: 2973 PID: P102 SPN: 102 FMI: 2/2 Intake Manifold Pressure – data incorrect. The ECM has detected an intake manifold pressure signal that is too high or low for current engine operating conditions.
Cummins ISX CM870 (2003-06) Fault Code: 2964 PID: P105 SPN: 105 FMI: 0/16 Intake Manifold 1 Temperature – Data Valid But Above Normal Operating Range – Least Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature is above engine protection warning limit.
Cummins ISX CM870 (2003-06) Fault Code: 2963 PID: P110 SPN: 110 FMI: 0/16 Engine Coolant Temperature – Data Valid But Above Normal Operating Range – Least Severe Level. Engine coolant temperature is above the engine protection warning limit.