Volvo AWD 850 Forum

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Computer Code 850 1997

posted by  Mr.T on  Wed Dec 17 01:14 CST 2008
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last visit: Sat Jul 24 05:31 CST 2010
[RELATED]

I have a 97 850 which keeps giving out PO172 codes (rich mixture). Anyone know the cure for this?








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    Computer Code 850 1997

    posted by  Ozark Lee on  Wed Dec 17 10:18 CST 2008
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    last visit: Thu Jan 3 22:08 CST 2013
    [RELATED]

    It usually comes down to either a vacuum leak or a dirty MAF sensor. Check all of the vacuum lines and use MAF cleaner or electrical contact cleaner on the MAF sensor element. Don't scrub the element - don't even touch it. Just spray it and let it dry.

    ...Lee







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