Oil Pressure Sensor: Description and Operation

PURPOSE
The fuel pump and engine oil pressure indicator switch has two functions, to indicate low engine oil pressure and to supply battery voltage to the fuel pump in the event the fuel pump relay fails.

OPERATION
The Powertrain Control Module (PCM) checks the engine oil pressure continuously. If the oil pressure switch indicates low oil pressure at any time, the PCM will send information through serial data to the instrument cluster to turn "ON" the "Low Oil Pressure" telltale.