1996 FWB - Check engine light on - Scanner turns off upon start up - HELP - Page 2
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 1996 FWB - Check engine light on - Scanner turns off upon start up - HELP in Past Cadillac Vehicle Discussion; Originally Posted by 6.0 Litre Anyways I'm happy now - but what sucks is that I'm always waiting for the ...
  1. #16
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
    Automobile(s): 1994 Fleetwood 60" Stretch; '07 Avalanche, '95 Nighthawk
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    Re: 1996 FWB - Check engine light on - Scanner turns off upon start up - HELP

    Quote Originally Posted by 6.0 Litre View Post
    Anyways I'm happy now - but what sucks is that I'm always waiting for the check engine light to come back ON *just a year long habit of looking at it always wishing it would turn off* Well it's been 80 miles already No check engine light and I swear I've look at the location of the check engine light for the past 75 miles waiting for it to come back on...LOL

    Thanks again you guys!
    Might have been corrosion at the data link connector that finally got knocked loose after plugging the scan tools in and out several times.

    Glad you got it all sorted out. If you had a big vacuum leak (the line to the PCV is a big one), it could take out the O2 sensors over time. The car must run a lot better now.

  2. #17
    6.0 Litre is offline Cadillac Owners Member
    Automobile(s): 2002 Escalade, 1996 Fleetwood Brougham
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    Re: 1996 FWB - Check engine light on - Scanner turns off upon start up - HELP

    Quote Originally Posted by turbojimmy View Post
    Might have been corrosion at the data link connector that finally got knocked loose after plugging the scan tools in and out several times.

    Glad you got it all sorted out. If you had a big vacuum leak (the line to the PCV is a big one), it could take out the O2 sensors over time. The car must run a lot better now.
    Yeah me too! Yes it was a big vacuum leak as I was able to hear it - but could never find it. Come to think of it it was leaking for a while and is taking out the O2 sensors and they do need replacing now.

    Oh yeah... BIG difference in acceleration too - I can actually burn off the line without the hesitation now no more chugging off the line upon full throttle!

  3. #18
    Cadillacboy's Avatar
    Cadillacboy is offline Cadillac Owners Connoisseur
    Automobile(s): 1996 Cadillac Fleetwood Brougham
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    Re: 1996 FWB - Check engine light on - Scanner turns off upon start up - HELP

    You should also be able to get a better fuel efficiency

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