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Fault codes 850

posted by  Dennis Gene on  Sat Dec 13 05:33 CST 2008
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last visit: Wed Mar 21 18:56 CST 2012
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We have a 1994 850 turbo sedan. It has a fault read out module on top of the engine. Always before we could read the faults and then clear the codes. We can't get the codes to clear anymore.. Do these modules go bad often.?. We know the dealer reads the faults from under the dash.Is it possible for the dealer to clear codes from under the dash without clearing the module? The reason we ask is that we have a check engine light on and it read the codes for front knock sensor. Also code for drivers side interior temp. sensor inlet fan seized. These are the same codes it read out when the dealer fixed it. We had the dealer replace the front knock sensor 1 1/2 year ago. hurtful expense. Can't believe that it would go out again so fast.. We have only gone 2000 miles in that time due to high gas prices. Would appreciate any ideas?? Not too happy with the Volvo dealer here..Lyle Pearson..







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    Fault codes 850

    posted by  KlausC on  Sat Dec 13 09:46 CST 2008
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    last visit: Fri Oct 24 10:15 CST 2014
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    I have never heard of one going bad, it is just an on/off switch. I had to replace my lead because the wire finally broke off on both ends!!

    Make sure the car is not running, just the key in posII. Close the car doors for some reason. If you can retrieve the code, you should be able to clear it after reading the code for the second time.

    EDIT: A normal hand held scanner will also work. The plug is under the "coin" tray. Ask to borrow one at your local auto parts store.

    Klaus

    --
    Volvoless. Sold the R. There is now a void...








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      Fault codes 850

      posted by  DennyG on  Tue Dec 16 07:54 CST 2008
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      Thank you so much Klaus~!! Closing the door made it work. Go figure! We do appreciate your helpful knowledge. Have a great holiday.. Sorry you sold your Volvo. We are likely going to sell ours soon. We are getting too old to be mechanics and keep it going.







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