The Canister Purge Valve (CPV) is a vital part of the Evaporative Emission Control System (EVAP) that helps emission control and seals the fuel system of your vehicle to prevent harmful fuel vapors from entering the environment. In modern cars, the CPV is an electrically operated solenoid that controlled by ECU, it controls when and how much fuel vapor is released from the canister into the intake to reduce pollutant emissions and fuel consumption