Fuel Rail Pressure And Temperature (FRPT) Sensor
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The Fuel Rail Pressure and Temperature (FRPT) sensor provides the Engine Control Module (ECM) with a continuous signal of fuel rail pressure via hardwired connection. The FRPT sensor is installed in the rear of the Bank 1 fuel rail. The FRPT sensor is screwed into a threaded boss in the fuel rail.
The FRPT 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 ECM to determine a pressure value. The FRPT sensor contains an Negative Temperature Coefficient (NTC) sensor which allows the ECM to determine the fuel temperature.