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  1. #1
    Join Date
    Jan 2009

    Default Check Engine Light Troubleshooting

    Hello All,

    I recently acquired a Volvo 850s Turbo Wagon and would like to keep it in good running condition. With that said, I am concerned with the 'check engine' and 'service' lights that keep popping up. I stopped at AutoZone and ran an OBDII diagnostic that produced the following..

    P0440: EVAP problem
    P0113: O2 sensor, bank one, sensor one
    P0172: Fuel trim bank one condition

    All my knowledge on these faults has been aquired today from reading various threads and I would greatly appreciate any help I could get concerning a course of action.

    I was also concerned with the cars maintenance history, as I am not the original owner, and was curious as to what was standard protocal for transmission maintenance. The car has 156k miles and, according to the service log I found in the glove box, its last service inspection was at 130k miles.

    Thanks for any and all advice.


  2. #2
    Join Date
    Feb 2003
    Dimock, PA


    You probably should focus on a forum that deals with 850's such as volvospeed

    Some general possibilities on your codes:

    P0440: an evaporative system problem, could be as simple as a gas cap not sealing tightly.
    P0113: O2 sensor, bank one, sensor one: you likely need the front O2 sensor replaced (not surprising at 130k miles)
    P0172: Fuel trim bank one condition: an evaporative emission control system problem; possibly a vacuum leak
    63 PV544 (attempted restoration)
    83 245 DL OSD (transferred to son)
    85 240 GL OSD (transferred to son)
    03 XC70 OSD (traded-in 4/12)
    05 AWD S80 OSD (transferred to son)
    12 XC70 T6
    16 S60 T5 Drive-E (FWD)

  3. #3
    Join Date
    Jan 2009



    Thanks for the help. Any suggestions on how I would go about checking for a vacuum leak?

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