Quote:
Originally Posted by glatt
Putting the gas cap on too loosely can cause the check engine light to come on. I suppose you could argue that putting a gas cap on incorrectly is a failure, but most people would probably disagree.
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So a check engine light is on. The mechanic says, "Ignore the light. It means nothing." Of course it means something. In that case, it meant the gas cap is loose or even missing.
Did that once. Forget to put that gas cap on after waiting fruitlessly for the gas attendant to come out (full service State). Heard the cap fall to the road. I was walking that highway when a State Trooper stopped me. He then found it. Troopers have better flashlights and better eyes. And a missing gas cap may also create other (and worse) failures. A missing gas cap is bad for multiple reasons.
Meanwhile, when the mechanic says the check engine light mean nothing, then find a mechanic with basic technical knowledge. Another lesson that others may learn from experience. Not just that the failure happened - but also why.