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Cummins ISL CM850 (2003-06) Fault Code: 499 PID: 98 SPN: 98 FMI: 4 Engine Oil Level Sensor Circuit – Voltage Below Normal or Shorted to Low Source. The engine oil level sensor has detected an internal failure.

Cummins ISL CM850 (2003-06) Fault Code: 499 PID: 98 SPN: 98 FMI: 4 Engine Oil Level Sensor Circuit – Voltage Below Normal or Shorted to Low Source. The engine oil level sensor has detected an internal failure.

Possible causes:

1)Open or short circuit internally to the oil level sensor
2)A failed oil level sensor
3)An open circuit in the oil level sensor circuit.

Possible repairs:

1)Replace the oil level sensor.
2)Replace the engine harness.
3)Replace the ECM.
4)The removal and installation of the connector may correct the fault.