94 850 cant get codes..light on whenever button pushed.

Discussion in 'Volvo 850' started by Long tall ugly, Feb 17, 2007.

  1. 94 850 se estate 20v 2 L


    Engine has poor performance (limp home mode ??) centre cylinder seems
    not to be firing.
    Spark plug is sparking (though not as well as others) lead changed, no
    Engine can almost be discribed only running on four cylinders .

    Tried to pull fault codes from A box but when I push the button the
    LED lights up straight away.
    No blinks ..the button is acting like a switch press it light on, let
    go light off.

    Any thought would be apreciated.

    Long tall ugly, Feb 17, 2007
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