The PCV is threaded into the rear of the left fuel rail. The PCV is a two wire normally open Pulse Width Modulated
(PWM) solenoid. The PCM relay supplies system voltage to one wire of the solenoid. The PCM uses a pulse width modulates ground to control the PCV until the desired fuel pressure is reached.
The PCV regulates the pressure in the fuel rails under specific operating conditions. The PCV controls the fuel
pressure using information from the Fuel Rail Pressure (FRP) sensor.