Oil Pressure Gauge: Description and Operation

ENGINE OIL PRESSURE (EOP) GAGE

The IPC displays the engine oil pressure on the analog EOP gage as determined by the PCM. The PCM monitors the signal circuit of the engine oil pressure sensor. When the engine oil pressure sensor resistance is high, the engine oil pressure is high. When the engine oil pressure sensor resistance is low, the engine oil pressure is low. The IPC receives a class 2 message from the PCM indicating the engine oil pressure. The IPC illuminates the check gages indicator when a low oil pressure condition exists. The engine oil pressure gage defaults to 0 kPa (0 psi) when the following condition occurs:
- The PCM detects a malfunction in the engine oil pressure sensor signal circuit.
- The IPC detects a loss of class 2 communication with the PCM.