engine light.. quotes code 121... solution please
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Cadillac Seville / Cadillac Eldorado Forum Discussion, engine light.. quotes code 121... solution please in Past Cadillac Vehicle Discussion; i have a problem with the engine start and shut off automatically.. i have an engine light that shows quote ...
  1. #1
    captdan is offline Cadillac Owners Member
    Automobile(s): 2004 sts
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    engine light.. quotes code 121... solution please

    i have a problem with the engine start and shut off automatically..

    i have an engine light that shows quote generic code 121..

    and my scan tool tells me pedal position A sensor..

    where do i find that????

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  3. #2
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: engine light.. quotes code 121... solution please

    You may get a better answer, quicker in the the Seville forum. Most of the crowd here has 2005 & up STS.

  4. #3
    MacMuse's Avatar
    MacMuse is offline Moderator
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    Whoops, missed that on the first read, thanks EChas. Moving thread to other area.

  5. #4
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Re: engine light.. quotes code 121... solution please



    Forget the scan tool, go to the top of the Seville/Eldorado page, and read the "sticky" on how to pull DTCs. List any codes you may find, AND their definitions, here (there is a link within the sticky with definitions).

    Interesting: your profile says 2004 STS, only the Seville SLS was available in '04. You do have a Cadillac Seville STS, and not an '05+ Cadillac STS right?

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: engine light.. quotes code 121... solution please

    No such thing as a 2004 "STS" (Seville Touring Sedan) unless it is a 2003 that was shipped overseas and titled in the 2004 model year. The driver's door sticker will have a latest build date of 06/03 - all STS production ceased in mid-June of 03 while SLS continued to 12/03, 5 months into the "2004 model year".

    The code and definition makes no sense whatsoever - you need to use the car's built-in code system. Codes will display as a system, number, and timing - as in P 0385 C = Powertrain - CKP sensor fault - Current.

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