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  1. P 0172 on a 2010 CTS 3.0

    2008-2013 Cadillac CTS General Discussion
    Hi, I have a 2010 CTS Wagon with the 3.0L. I’m getting a P0172 code and the odd misfire. Just replaced the spark plugs but no change. Could it be an O2 sensor.. any ideas? Thanks.
  2. 1990 4.5l misfire e49 and low compression reading

    HT4100 4.1, 4.5, 4.9
    New to the forum and looking to get some info and opinions on a problem I am having. I will give you guys a basic run down as detailed as possible and if I miss anything or you guys need anything let me know please. 1990 Cadillac Coupe Deville Just hit 99k original miles I bought the car from...
  3. Another random misfire thread

    Cadillac DeVille 1985 to 2005 including:1985-1992
    2003 DeVille with 80k miles has been driving absolutely fine, smooth and powerful, when tonight I am cruising slowly around my neighborhood looking for parking and the car suddenly starts shaking. I hoped it was the road surface but soon convinced myself otherwise -- it shook when stopped, a...
  4. Deville 1995 4.9L Misfire --single piston-- (No check engine light on)

    Cadillac DeVille 1985 to 2005 including:1985-1992
    Hello there! I have had this car for three years now and it has been absolutely great. Never had a problem with until now. It has about 150k miles on it (I personally put 30k on it). I had it serviced to change the water pump that was making unhappy noises. Then, for some obscure reason, I...
  5. Random Multiple Misfires

    Cadillac STS Forum 2005 through 2012
    I bought a 2005 STS a few weeks ago. I knew it needed help, call it a rescue(well maybe). First thing I did, after checking fluids of course, was change out the spark plugs. When I did that, I found oil in a couple of the wells, so I swapped out the valve cover gaskets. No more oil in the wells...
  6. P 0700 Code After Replacing Spark Plugs

    2008-2013 Cadillac CTS General Discussion
    Bit of a weird week. I've a 2008 CTS4 DI that earlier this week the check engine light blinked 3 times and then went out (indicating a misfire as I understand). Ran it for a day planning on doing spark plugs over the weekend. Before I could though, it threw a p430 so I figured I probably blew...