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Your evaporative emission control system is both part of your fuel system and your engine control system. It's purpose is to prevent gasoline vapors escaping into the atmosphere. It does this by capturing them from the top of your fuel tank and storing them in a charcoal canister. Your vehicle will then pull the vapors through lines into the engine. The engine uses these vapors to supplement the fuel used by your engine.


When your check engine light comes on for a EVAP code that means that anyone of the components in this system which include multiple valves or lines could have an issue. The way to know which of these components is the issue is to preform a smoke test. This will show which component is leaking and causing your check engine light.


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Happy Adventures,

Heather


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