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  1. Kershaw7

    Engine codes!! Help!

    Ok every one. My wife has a 2004 matrix. Recently her car showed a code of po511, prior to this he car had a very high idle like 2500 when cold. I replace IAC. Car idled perfectly about 1300 when cold and 750 warm and in neutral. After 60 miles her car sent code Po505. I reset code and it has...
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