Cummins ISM CM870 (2003-06) Fault Code: 449 PID: P094 SPN: 94 FMI: 0/16 Fuel Pressure High - Warning. High fuel pressure was detected at the fuel rail in the IFSM.

The fuel pressure is monitored by the ECM. If the rail fuel pressure is higher than an acceptable range for engine operating conditions, the fault code is logged.

Possible repair:

1)Correct drain line restriction.
2)Replace the rail fuel pressure sensor.

Cummins ISM CM870 (2003-06) Fault Code: 443 PID: S221 SPN: 1043 FMI: 4/4 Accelerator Pedal Position Sensor Supply Voltage Circuit - shorted low. Low voltage detected at sensor supply circuit to the accelerator pedal position sensor.

Cummins ISM CM870 (2003-06) Fault Code: 435 PID: P100 SPN: 100 FMI: 2/2 Engine Oil Pressure Sensor Circuit - data incorrect. An error in the engine oil pressure sensor signal was detected by the ECM.

Cummins ISM CM870 (2003-06) Fault Code: 434 PID: S251 SPN: 627 FMI: 2/2 Power Lost Without Ignition OFF. Supply voltage to the ECM fell below 6.2 volts momentarily, or the ECM was not allowed to power down correctly (retain battery voltage for 30 seconds after key OFF).

Cummins ISM CM870 (2003-06) Fault Code: 433 PID: P102 SPN: 102 FMI: 2/2 Intake Manifold Pressure Sensor Circuit - Data Incorrect. An error in the intake manifold pressure signal was detected by the ECM.

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