Fuel Rail Pressure Sensor
WARNING: This page is about a different car, the 2011 Jaguar XK and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
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.