Cummins ISM 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.

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.

Possible causes:

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

Possible repairs:

1)Replace the intake manifold pressure sensor.
2)Replace the ECM
3)Repair or replace the engine harness.

Cummins ISM CM875 (2003-06) Fault Code: 111 PID: S254 SPN: 629 FMI: 12/12 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 ISM CM875 (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 ISM CM875 (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 ISM CM875 (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.

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