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Winter mode & fleeting trans problem. 850 1996

posted by  Richard on  Mon May 6 16:09 CST 2002
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last visit: Sun Sep 17 17:22 CST 2000
[RELATED]

So there I was on a long weekend, hoping to find some great NY state wine with wife and friends and this happens: started the car in the AM and it was in "winter mode" with the arrow and the sport setting light for the trans flashing away and the check engine light is on. After several attempts to push buttons, move levers and plead with the electronic gods proved fruitless I turned the car off and checked trans fluid. Everything was fine.

Start the car again and now the trans works as it should, the arrow is gone but the check engine light is still there. The return ride to Pa. two days later went as it should.

Of course I'll have my tech check it.

Any thoughts?

Thanks.
--
The 96 is number 8.








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    Winter mode & fleeting trans problem. 850 1996

    posted by  dklew on  Mon May 6 17:20 CST 2002
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    last visit: Wed Nov 25 15:07 CST 2009
    [RELATED]

    Sure sounds like the PNP switch. The next time this happens and the car won't start or starts moving in 3rd gear (limp home mode),try shutting the engine off and turn the ignition switch to the 2nd position and shift the transmission from Park to Drive about 20-30 times. This is supposed to clean the PNP switch contacts. Eventually you'll have to replace the switch.







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    Winter mode & fleeting trans problem. 850 1996

    posted by  someone claiming to be Ray N. on  Mon May 6 16:29 CST 2002 [RELATED]

    Classic description of the PNP switch failure. Very common. Typically
    act up on first cold morning (so you are a bit out of sync unless it is
    still cold in NY).

    See: http://www.volvospeed.com/Repair/pnpswitch.htm

    Warning: More then one transmission has been replaced when this
    switch is bad and replacing the switch is what is needed. Cost
    is 3 to 4 hundred to replace. You can probably go for a few months
    with it as is -- don't have to replace immediatly, but will eventually.
    Turning off the engine and restarting often clears it (eventually
    it won't).







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