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 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.