Q: I am having a problem with my gas cap that is creating an engine warning on my dash. I have been tightening the gas cap quite a few times. I will sometimes get it to clear the check engine light, but it will soon come back to haunt me. Recently I bought locking gas cap thinking it may tighten up the cap and make the warning message go away, but that has not happened.

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A: Check the neck of the filler fuel pipe. Th

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