Cummins ISB CM850 (2003-06) Fault Code: 132 PID: 91 SPN: 91 FMI: 4 Accelerator Pedal or Lever Position Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at accelerator pedal or lever position signal circuit.

Cummins ISB CM850 (2003-06) Fault Code: 132 PID: 91 SPN: 91 FMI: 4 Accelerator Pedal or Lever Position Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at accelerator pedal or lever position signal circuit.

If troubleshooting an intermittent accelerator problem:

The accelerator pedal or lever position sensor signal voltage can be monitored with the INSITE? electronic service tool, while flexing the harness to locate the intermittent connection. Intermittent connections will show up as abrupt changes in signal voltage displayed by INSITE? electronic service tool.

Possible causes:

1)Accelerator pedal or lever position signal shorted to engine ground or return wires in the OEM harness or sensor.
2)Failed 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 repairs:

1)Replace the accelerator pedal or lever.
2)Repair or replace the OEM harness.
3)Replace the ECM.