Posts Tagged: P0520

P0520 Engine Oil Pressure Sensor/Switch Circuit Malfunction

April 5, 2015

Fix a P0520 Engine Oil Pressure Sensor/Switch Circuit Malfunction If you own a GM vehicle and have a trouble code P0520 Engine Oil Pressure Sensor/Switch Circuit Malfunction, start your diagnosis with the oil pressure switch. Ford uses an inertia shutoff switch to shut down the fuel pump if the vehicle is involved in an accident. GM uses the oil pressure switch as an inertia fuel shutoff. When turning the key to the RUN position, PCM provides ground to the fuel pump relay for 2-seconds to power the pump and build … Read More