JoJoStar420 Posted July 22, 2012 Report Posted July 22, 2012 i changed the battery in my 1991 buick park avenue yesterday and ever since than my check engine light has come on and the code is quad driver failure, also i have lost first gear and overdrive. i would really appriciate any info anyone has to offer because i have to work tomorrow and have no idea how i am getting there. i have reset the computer multiple times and checked every fuse under the hood and dash Quote
Schurkey Posted July 23, 2012 Report Posted July 23, 2012 the code is quad driver failure Time for a different computer. Of course, you'll want to follow the diagnostic procedure for that trouble code; but you can pretty much expect to need a replacement ECM. Quote
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