check engine light

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Why does "the check engine" light come on but no codes come up with a diagnostic check. Light was shut off but came back on within minutes of running. Car has 120,000 mi.

milkeefer in Needham MA

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Aug 14, 2010

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2 Replies

Popular Answer
Bret Bodason Aug 14, 2010

If the idle speed is too low this can happen, does the light go out if you rev the engine up?

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Visitoron Aug 16, 2010

No, it just stays on all of the time.

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Visitoron Mar 28, 2011

Make sure your gas cap is on tight and makes a good seal. We've experienced this two times and both times it was corrected by tightening the cap better.

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