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

  • Thread starter Thread starter Long tall ugly
  • Start date Start date
L

Long tall ugly

94 850 se estate 20v 2 L

Problem...

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
difference
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.


John
 
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