DESCRIPTION:Short to voltage or open on Engine Oil Pressure (EOP) circuit.

MONITORED PARAMETER:Engine oil pressure.

TYPICAL ENABLING CONDITIONS:Always on

MONITOR SEQUENCE:1. Key on2. Engine running

EXECUTION FREQUENCY:Continuous when enabling conditions are met.

TYPICAL DURATION:Two seconds

DASH LAMPS:CEL

ENGINE REACTION:None

VERIFICATION:Check at engine operating temperature.

NOTE: If diagnostic leads to a mechanical (non-electrical) low oil pressure condition, all mains and connecting rods should be inspected.

NOTE: If 100-3, 94-3, and 4407-3 are present, repair the short to power between pin 82 of the 120 pin ECM connector and the engine oil, doser fuel line, and doser fuel compensation sensors.

PROBABLE CAUSES:1. Engine oil pressure sensor connector/harness.2. Engine oil pressure sensor.