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2004 Chevrolet Express 3500 Question: what does code po137 mean when the van is idling high

 

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sweeett, Edmond, OK, July 09, 2013, 01:03
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when you start the van it idles very high continuous. code po137.

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  • Answer #1

    pushrod July 09, 2013, 03:32
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     Master

    Possible vacuum leak causing increased engin rpm @ idle. Code PO137= downstream (behind cat. conv.) O2 sensor or it's circuits problem. Have a mechanic perform scan test to confirm!

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  • Answer #2

    Greg's Orange Auto (13485 Answers) , Orange, CA - (714) 361-9386
    globalhelper July 09, 2013, 06:14
     Master

    agree with #1

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