Fuel System Overview
Fuel injection pressure is measured by the high-pressure fuel rail sensor (FRP). Injection pressure is controlled by the high pressure pump and two regulating valves, a Pressure Control Valve (PCV), and a Fuel Metering Unit (MeUn), formerly known as Volume Control Valve (VCV).
NOTE:
the 3.2L diesel uses a VCV only; it does not have a PCV.