Fuel Pressure Sensor/Switch: Description and Operation

Fuel Rail Pressure Sensor






The fuel rail pressure sensor is installed to the fuel rail and it detects the fuel pressure in the fuel rail, converts the pressure into a voltage signal, and sends the signal to the engine control module (ECM). Higher fuel rail pressure provides higher fuel pressure sensor voltage while lower pressure provides lower fuel pressure sensor voltage. The ECM calculates actual fuel rail pressure from the voltage signal and uses the result in fuel injection control and other control tasks.