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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, DTC Codes in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Can anyone tell me about these error codes I am getting on my 2007 CTS 3.6L? The codes are U1040, ...
  1. #1
    kalamarca is offline Cadillac Owners Member
    Automobile(s): 2007 CTS
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    Churchville, PA 18966
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    DTC Codes

    Can anyone tell me about these error codes I am getting on my 2007 CTS 3.6L? The codes are U1040, U1064, U1153, U1192, and P1629. I am afraid that it might be my ECM. I have 92K miles on it. Also, is the repair covered by the powertrain warranty?

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  3. #2
    san2cci's Avatar
    san2cci is offline Cadillac Owners Fanatic
    Automobile(s): 05 3.6 CTS, Volant, V Exhaust, Hotchkis (SOLD!); 2010 2SS
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    Re: DTC Codes

    U1040 =
    U1064 = ECM to body control module communication - no signal
    U1153 =
    U1192 =
    P1629 = Theft Deterrent Fuel Enable Signal Not Received Conditions



    Can't find any of the other ones but I'm assuming you're correct with the bad ECM
    Call the GM call center and give them your VIN and ask them what warranties are still active, and if the ECM is still covered.

  4. #3
    kalamarca is offline Cadillac Owners Member
    Automobile(s): 2007 CTS
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    Thank you.

  5. #4
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
    Automobile(s): All Cadillac vehicles!
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    Re: DTC Codes

    kalamarca,
    We can check to see if any warranties are in effect as well. Send us the last 8 digits of your VIN either via email (katie_lucille@gmexpert.com) or private message here on the forum.

    Sarah (Assisting Katie), Cadillac Customer Service

  6. #5
    kalamarca is offline Cadillac Owners Member
    Automobile(s): 2007 CTS
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    I replied directly to your email with my VIN. Thank you.

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