Purge valve, how it works, symptoms, problems, testing
Canister Purge Valve: What It Does And Why It Matters - eManualOnline Blog
Mechanic told me that this purge valve is causing my P0171 code in my 2007 Toyota Corolla CE and NOT the intake manifold gasket being old. Can a purge valve even cause
Solve Vapor Canister Purge Valve and Vent Solenoid Problems
5 Symptoms of a Bad Vapor Canister Purge Valve (and Replacement Cost)