Fuel Charging And Controls - V8 S/C 5.0L Petrol (G2318509): Operation: Notes
WARNING: This page is about a different car, the 2020 Land Rover Range Rover Velar. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) controls the output from the High Pressure (HP) fuel pumps to deliver the required volume of fuel at pressures up to 200 bar (2900 psi).
The PCM uses the signal from the Fuel Rail Pressure and Temperature (FRPT) sensor to calculate the time the fuel injectors need to be energized. This makes sure that the fuel injectors deliver the correct mass of fuel to the combustion chambers.