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.

Low voltage on the +5 volt supply line can be caused by a short circuit to ground in the supply line, a short circuit between the supply line and return circuit, a failed accelerator, or a failed ECM power supply.

Possible repairs:

1)Replace the accelerator pedal/lever position sensor.
2)Repair or replace the OEM harness.

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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.

Cummins ISM CM870 (2003-06) Fault Code: 432 PID: S230 SPN: 558 FMI: 13/13 Accelerator Pedal Idle Validation Circuit - out of calibration. Voltage at idle validation on-idle and off-idle circuit does not match accelerator pedal position.

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