Oil Pressure Sensor: Description and Operation

The engine oil pressure sensor is a rheostat mounted in the oil filter adapter. The PCM supplies the sensor with a 5 volt reference and a ground. The sensor varies the 5 volt input voltage relative to the oil pressure at various engine speeds. The PCM uses the signal voltage to calculate the amount of fuel in the tank.

The PCM sends the oil pressure information via Class 2 to the Instrument Panel Cluster (IPC). The IPC uses the information to control the oil pressure indicator.