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Cummins ISM CM875 (2003-06) Fault Code: 559 PID: P157 SPN: 157 FMI: 1/18 Injector Metering Rail 1 Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level. The engine control module (ECM)

The ECM estimates the amount of fuel delivered to each bank by monitoring the crankshaft acceleration pattern as it rotates. This fault is set active if the ECM estimates that the front bank is receiving insufficient fuel flow.

Possible repairs:

1)Install the original front fueling actuator.2)Replace the o-rings.

Cummins ISM CM875 (2003-06) Fault Code: 551 (SSS) PID: S230 SPN: 558 FMI: 4/4 Accelerator Pedal Idle Validation Circuit – data incorrect. No voltage detected simultaneously on both idle validation and off-idle validation switches.
Cummins ISM CM875 (2003-06) Fault Code: 551 (ISS) PID: S230 SPN: 558 FMI: 4/4 Accelerator Pedal Idle Validation Circuit – data incorrect. No voltage detected simultaneously on both idle validation and off-idle validation switches.
Cummins ISM CM875 (2003-06) Fault Code: 551 (NISS) PID: S230 SPN: 558 FMI: 4/4 Accelerator Pedal Idle Validation Circuit – data incorrect. No voltage detected simultaneously on both idle validation and off-idle validation switches.
Cummins ISM CM875 (2003-06) Fault Code: 547 PID: P094 SPN: 94 FMI: 4/4 Rail Fuel Pressure Sensor Circuit – shorted low. Low signal voltage detected at rail fuel pressure circuit.
Cummins ISM CM875 (2003-06) Fault Code: 546 PID: P094 SPN: 94 FMI: 3/3 Rail Fuel Pressure Sensor Circuit – shorted high. High signal voltage detected at the rail fuel pressure circuit.
Cummins ISM CM875 (2003-06) Fault Code: 486 PID: P129 SPN: 1349 FMI: 1/18 Injector Metering Rail Number 2 Fueling Low – WarningAn unexpectedly low fuel delivery was detected on the rear three cylinders.