Fuel Rail Pressure Sensor
The fuel rail pressure (FRP) sensor provides the engine control module (ECM) with a continuous signal of fuel rail pressure. The fuel rail pressure (FRP) sensor is installed in the rear of the right-hand (RH) fuel rail. The fuel rail pressure (FRP) sensor is screwed into a threaded boss in the fuel rail. A flying lead and three pin connector provides the interface with the engine harness.
The fuel rail pressure (FRP) sensor contains a steel diaphragm fitted with strain gages, which are incorporated into a Wheatstone bridge. The output from the Wheatstone bridge is processed by the engine control module (ECM) to derive a pressure value.