Fuel Rail Pressure And Temperature Sensor
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The Fuel Rail Pressure and Temperature (FRPT) sensor provides the Powertrain Control Module (PCM) with a continuous signal of fuel rail pressure and temperature. 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 installed with strain gages, which are incorporated into a Wheatstone bridge. The output from the Wheatstone bridge is processed by the PCM to determine a pressure value. The FRPT sensor contains a Negative Temperature Coefficient (NTC) resistor which allows the PCM to determine the fuel temperature.