Question about 2002 Mercedes-Benz C-Class

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Check engine light stays on. my mechanic put

Check engine light stays on. my mechanic put scope on and readinf says small emmissiom leak (gas cap faulty) replaced gas cap still have problem??? what should i do?

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After the repair on 1996 and newer you must have the light deleted or it will stay on even after a repair

Posted on Jul 13, 2010

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when check engine light comes on VSC is disabled. small leak is for evaporative system (to prevent fuel vapors from entering the atmosphere) small leak is A leak less than forty thousandths of an inch, it could possibly be a gas cap not fully tightened,leak in a vapor line,leaking fuel filler neck,gas tank leak,purge valve,vent valve just to name afew. clearing code will turn off both lights but if theres a leak lights will come back on.

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