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2008-2013 Cadillac CTS General Discussion Discussion, problem in Cadillac CTS Second Generation Forum - 2008-2013; its all good halister i appreciate your time. the problem began with 3 bad coils,changed them+all the plugs. then the ...
  1. #16
    avi1777 is offline Cadillac Owners Member
    Automobile(s): 2009 cts
    Join Date
    Jan 2014
    Posts
    77

    Re: problem

    its all good halister i appreciate your time.
    the problem began with 3 bad coils,changed them+all the plugs.
    then the cat died(at least thats what the dealer claimed,this whole check engine is half a scam to make money any way),
    so u think the o2 sensor can be damaged from a bad cat?
    tnx

  2. #17
    avi1777 is offline Cadillac Owners Member
    Automobile(s): 2009 cts
    Join Date
    Jan 2014
    Posts
    77

    Re: problem

    ?
    thanks

  3. #18
    HurstGN is offline Cadillac Owners Enthusiast
    Automobile(s): 09 CTS4 DI Black Raven/Ebony
    Join Date
    Jun 2012
    Location
    Pittsburgh, PA
    Posts
    699

    Re: problem

    Quote Originally Posted by avi1777 View Post
    its all good halister i appreciate your time.
    the problem began with 3 bad coils,changed them+all the plugs.
    then the cat died(at least thats what the dealer claimed,this whole check engine is half a scam to make money any way),
    so u think the o2 sensor can be damaged from a bad cat?
    tnx
    If you were running excessively rich, the O2 sensor can become fouled, as well as the cat beginning to melt down from too much unburnt fuel in the system. In the old days, if you caught an O2 sensor being fouled early on, a cleaning of the sensor with brake cleaner would sometimes fix it before the contamination became too hard to remove. This from racers that pretty much knew when they fouled the O2 sensor. If it's been more than a week or two, it's probably best to just replace it. I should probably note that when we cleaned them, we were running thin on funds and the O2 sensors were pricey and hard to come by (due to specific application)
    avi1777 likes this.

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