2006 Dts-Where is the ECU
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Cadillac DTS Forum - 2006 through 2012 Discussion, 2006 Dts-Where is the ECU in Past Cadillac Vehicle Discussion; I think I need a new ECU for different reasons. Can some please tell me where the ecu is located....Thank ...
  1. #1
    cadwilliam is offline Cadillac Owners Member
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    2006 Dts-Where is the ECU

    I think I need a new ECU for different reasons. Can some please tell me where the ecu is located....Thank you.

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    crazcaddyguy's Avatar
    crazcaddyguy is offline Cadillac Owners Fanatic
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    I believe and please someone chime in... but it's in the air cleaner box. You have to open it then pull the cover off, then you will see it by the front of the car.

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    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
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    Re: 2006 Dts-Where is the ECU

    The ECU very seldom goes bad....
    Why do you think you need a new one ??

    The ECU is "INSIDE" the cold air tube.... right behind the drivers side headlight...
    The Transmission Control Unit is mounted on the inside of the drivers fender right close to the master cylinder...
    It has a big blue connector on it.

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    cadwilliam is offline Cadillac Owners Member
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    The reason I believe I need a new ecu it car will sometime run really rough. Then the car will raise the rpm up and down on its own until it corrects itself. Also the car will cut off on its own sometime and then will wont do it for awhile so basically the car will run incorrectly at times...what's your guys opinion??

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    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
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    Re: 2006 Dts-Where is the ECU

    That does not sound like the ECU...
    Go to some place (like AutoZone) that can read the codes.
    WRITE THEM DOWN and then post them here.

    We will help you decipher them and what they mean.
    crazcaddyguy likes this.

  7. #6
    cadwilliam is offline Cadillac Owners Member
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    No codes but sometimes a code for the oxygen sensor will come on and go off on its own. That's all...

  8. #7
    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
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    Re: 2006 Dts-Where is the ECU

    Quote Originally Posted by cadwilliam View Post
    No codes but sometimes a code for the oxygen sensor will come on and go off on its own. That's all...
    Check your INTAKE MANIFOLD bolts... make sure they are snugged down good.
    You may have a vacuum leak.

    Call around to some local garages and find someone with a TECH 2....
    A Tech 2 will read ALL the codes... The Autozone scanners can only read engine codes.

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    Cadillac Cust Svc is offline Cadillac Customer Service
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    Re: 2006 Dts-Where is the ECU

    Quote Originally Posted by cadwilliam View Post
    The reason I believe I need a new ecu it car will sometime run really rough. Then the car will raise the rpm up and down on its own until it corrects itself. Also the car will cut off on its own sometime and then will wont do it for awhile so basically the car will run incorrectly at times...what's your guys opinion??
    Hello cadwilliam,

    I see Superjim has offered advice for your situation. I am sorry you are dealing with a vehicle concern of it running rough. If you would like to further discuss your current situation, please reach out to us via private message and include your contact information, VIN and current mileage.

    Sincerely,

    Laura M.
    Cadillac Customer Care

  10. #9
    cadwilliam is offline Cadillac Owners Member
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    I have attached a photo. I checked all my bolts and they a tight. Also I don't believe it would be a manifold issues because the problem is not consist enough but that may not mean nothing. In the attach photo there is a small pipe sticking out, it is black. Is there a hose that is suppose to be attach to that pope coming out of the manifold?
    Attached Images

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