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Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Electronic Engine Controls - TDV6 3.0L Diesel -- Range Rover/L405) >> Electronic Engine Controls - TDV6 3.0L Diesel >> Electronic Engine Controls (Description And Operation) >> Description And Operation >> Description >> Fuel Rail Pressure Sensor

Fuel Rail Pressure Sensor

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
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The Fuel Rail Pressure (FRP) sensor is located in a threaded port in the forward end of the fuel rail for the right cylinder bank.

The sensor measures the fuel pressure in the fuel rail which is supplied from the High Pressure (HP) fuel pump.

The FRP sensor is a piezo resistor type sensor. The sensor receives a 5 V reference voltage supplied through a resistor within the Powertrain Control Module (PCM). The sensor produces an analogue signal of between 0 and 5 V depending on the pressure sensed. Low Pressure (LP) gives a low voltage output and consequently HP gives a higher voltage output. The PCM uses this pressure signal to monitor the fuel pressure in the fuel rail and adjust the fuel metering valve to control the fuel pressure.

The PCM monitors the FRP sensor for faults and can store fault related Diagnostic Trouble Codes (DTC). These can be retrieved using an approved diagnostic system. For additional information, refer to: FUEL CHARGING AND CONTROLS

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