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Re: Vent valve only for testing?
Posted to Technical Theory Forum on 10/28/2016

EVAP Vent Solenoid Valve

The EVAP vent solenoid valve controls fresh airflow into the EVAP canister. The valve is normally open. The canister vent solenoid valve is closed only during EVAP system tests performed by the ECM like large leak and engine off natu... Login to read more.