Evaporative Check Valve: Description and Operation

EVAP Two Way Valve and EVAP Bypass Solenoid Valve




The EVAP two valve is installed between the fuel tank and the EVAP canister line.

The EVAP two way valve sends fuel vapor to the EVAP canister corresponding to the pressure inside the fuel tank and vacuum, and it is returned in the fuel tank. The EVAP bypass solenoid valve opens to bypass the two way valve when doing the EVAP leak check.