Cummins ISC CM2150 (2007-09) Fault Code: 141 PID: 100 SPN: 100 FMI: 4 Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the engine oil pressure circuit.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

The oil pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 141, check for multiple faults.

Possible causes:

1)A signal circuit open or shorted to ground in the engine harness or sensor
2)A supply wire open or shorted to ground.

Possible repairs:

1)Replace the oil pressure sensor.
2)Replace the ECM
3)Repair or replace the engine harness.