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Cummins ISX CM870 (2003-06) Fault Code: 132 PID: P091 SPN: 91 FMI: 4/4 Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at accelerator pedal position number 1 signal circuit

Possible causes:

1)Accelerator pedal or lever position signal shorted to engine ground or return wires in the OEM harness or sensor
2)Damaged accelerator pedal or lever position sensor
3)Open circuit in the accelerator signal, supply, or return wire in the harness or connectors.
NOTE: The three wires in the accelerator position sensor circuit must be twisted together

Possible repair:

1)Repair the damaged harness, connector, or pins, if possible.
2)Repair or replace the OEM wiring harness.

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