Ford P0520 OBD-II Trouble Code Definition: P0520 Engine Oil Pressure Sensor/Switch Circuit Malfunction P0520 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0520 Engine Oil Pressure Sensor/Switch Circuit What does the code mean? OBD-ii Code P0520 definition: The PCM continuously monitors the engine oil pressure. The Oil Pressure Sensor/Switch sends a signal to the PCM when the […]