Fuel Rail Pressure And Temperature Sensor
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The FRPT sensor provides the 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 fitted with strain gauges, 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 an Negative Temperature Coefficient (NTC) sensor which allows the PCM to determine the fuel temperature.