Cumminz

Cummins ISB CM850 (2003-06) Fault Code: 135 (Auto) PID: 100 SPN: 100 FMI: 3 Oil Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source. High signal voltage detected at the engine oil pressure circuit. 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 135, check for multiple faults. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Signal circuit shorted to sensor supply or battery voltage. Possible repairs: 1)Replace the...

Cummins ISB CM850 (2003-06) Fault Code: 135 (Marine) PID: 100 SPN: 100 FMI: 3 Oil Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source. High signal voltage detected at the engine oil pressure circuit. The engine oil pressure sensor is located on the left side of the engine block. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Signal circuit shorted to sensor supply or battery voltage. Possible repairs: 1)Replace the oil pressure sensor.2)Replace the ECM.3)Replace the engine harness.

Cummins ISB CM850 (2003-06) Fault Code: 141 (Auto) PID: 100 SPN: 100 FMI: 4 Oil Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at the engine oil pressure circuit 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)Signal circuit open or shorted to ground in the engine harness or sensor2)Supply line open or shorted to ground. Possible repairs:...

Cummins ISB CM850 (2003-06) Fault Code: 141 (Marine) PID: 100 SPN: 100 FMI: 4 Oil Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at the engine oil pressure circuit. Possible causes: 1)Signal circuit open or shorted to ground in the engine harness or sensor2)Supply line open or shorted to ground. Possible repairs: 1)Replace the oil pressure sensor.2)Replace the ECM.3)Replace the engine harness.

Cummins ISB CM850 (2003-06) Fault Code: 143 (Auto) PID: 100 SPN: 100 FMI: 1 Engine Oil Rifle Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level. Engine oil pressure signal indicates engine oil pressure is below the engine protection warning limit. The engine oil pressure sensor is located on the left side of the engine block. Possible repairs: 1)Refer to the Lubricating Oil Pressure Below or Above Normal troubleshooting tree in Troubleshooting and Repair Manual, ISC, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418 or ISBe and ISB (Common Rail Fuel System) Series Engines, Bulletin 4021271.