Chevy Silverado 2025 Evap System. When there’s a problem—such as a leaking gas cap—somewhere in the system, your car’s primary computer (often. Attached to the canister is a vent valve/solenoid which is responsible for letting outside air into the canister to dilute the fuel vapors prior to sending them to the engine.
It signifies a problem in the vehicle’s evaporative emission control (evap) system vent control circuit. The evap system (evaporative emission control system) in a 2014 silverado is designed to capture and store fuel vapors from the fuel tank and prevent them from escaping into the.