The fuel injection pressure sensor llows correct fuel pressure readings in the fuel rail system which enables the PCM or main computer of the vehicle to provide the exact amount of fuel pressure needed for the vehicle to operate properly to while lowering evaporative emissions.
The fuel pressure sensor can be found just above the fuel rail lines which are mostly in front of the engine on most models. Depressurizing the fuel system is a must before removal and can be done by starting the engine and removing the fuse for the fuel pump.
Ignition needs to be turned on and off a couple times after installation of the new fuel sensor to pressurize fuel circulation before starting the engine.