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Code P0172, please help 850 1996

posted by  Thomass on  Thu Jan 10 11:50 CST 2002
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last visit: Fri Jul 13 01:50 CST 2007
[RELATED]

Hi all you experienced guys out there.
I have a problem with my -96 854R that I cant seem to get a grip around.
After about 15 min of idling time, when hot, the check engine light came on,
After reading code P0172, "Bank 1 too rich" we reset the code and it was fine
for about a week. Then today after about 2 min of idling following
a cold start at approx. 50F the light appeared again. It seems that I am running rich only at idle, because gong down the road i am registering about 24.2 MPG wich is normal to my car and my way of driving.
I would appreciate any help in this matter.
Thanks
/Thomas








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    Code P0172, please help V70-XC70 1998

    posted by  Tom E on  Thu Jan 10 17:03 CST 2002
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    last visit: Tue Jul 15 18:46 CST 2014
    [RELATED]

    This code has popped up in my car as well, also while idling, at a traffic light. It is my understanding that the car must idle 30 seconds for diagnostics to be performed. After clearing the code, I would go weeks sometimes without a Check Engine light. Then it would pop up again. I thought it could be a gas cap issue, and bought a new gas cap, but that didn't stop the occasional 172 code.

    When I posted the question on this board, nobody seemed to know what it was. Rich K, of Bay 13 did not recognize the code. Since I am using a generic scan tool, maybe Volvo maps that code differently. I'm going to call 1-800-25Volvo (258-6586) and get the Pocket Data Handbook that includes all the codes.

    My independent also didn't know what it was. Maybe I should just take it to the dealer for a reading when it pops up again.

    Let me know what you find out.

    - Tom E
    --
    98 V70 GLT black 54k







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