The Fuel Pressure Regulator Valve is installed on high pressure pump. This valve controls fuel inlet (feed) from fuel tank via fuel filter.

This system is called "Fuel Pressure Control System" and can precisely and quickly control the fuel pressure in accordance with various engine conditions by controlling the fuel inlet.

A: Fuel Feed Line (From fuel tank via fuel filter) [Low pressure fuel]

B: Fuel Feed Line (To common rail) [High pressure fuel]

C: Fuel return (To fuel tank) [Low pressure fuel]