Transmission (?) problem with my 2001 DHS
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Transmission (?) problem with my 2001 DHS in Past Cadillac Vehicle Discussion; Just a introduction to my car, it was bought by my grandma new, she used it as a daily until ...
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    rusmada is online now Cadillac Owners Member
    Automobile(s): 2001 Deville DHS
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    Post Transmission (?) problem with my 2001 DHS

    Just a introduction to my car, it was bought by my grandma new, she used it as a daily until it stopped blowing cold air. Now it wont upshift and wont go over 20mphs, I hope its a simple diy fix. Any help accepted!

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    RON93's Avatar
    RON93 is online now Cadillac Owners Enthusiast
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    Re: Problem with my 2001 Cadillac Deville DHS

    First step would be to tell us if you checked the car for any trouble codes.

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    1969byrdman's Avatar
    1969byrdman is offline US Coast Guard: Semper Paratus
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    Re: Problem with my 2001 Cadillac Deville DHS

    Welcome to the forums!

    see the sticky post at the top of this page "how to pull codes". Your car has a built in scanner. Have pen/paper handy to write down the codes. They will read out as a letter followed by 4 numbers, and indicate whether the code is current or history. Then go here: http://www.cadillacfaq.com/faq/answers/dtccode.html to get code definitions. Post the codes AND definitions and you'll get possible solutions posted by members. There are several thousand codes so be sure to post the definitions.

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    Harry Yarnell is offline Cadillac Owners Connoisseur
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    Re: Problem with my 2001 Cadillac Deville DHS

    Does it struggle to try to accelerate? Clogged cat comes to mind.

  6. #5
    rusmada is online now Cadillac Owners Member
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    Thread Starter

    Re: Problem with my 2001 Cadillac Deville DHS

    Hey sorry for the long response, been a crazy few weeks. Just as a update I used some seafoam and it got the car to start accelerating again. I also pulled the codes. P0410 - Secondary Air Injection System. P0101 - Mass or Volume Air Flow Circuit Range/Performance

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, install a sound system
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    Re: Transmission (?) problem with my 2001 DHS

    I smell air leaks in the intake ducting at or after the MAF. New air filter - use a WIX, Fram, AC Delco, PartsMaster, Purolator, etc.. Forget the K&N overpriced crap.

    Car won't accelerate - clogged cat for starters - forget the SnakeOil.

    Study this to begin to scratch the surface of learning about a Northstar engine system - https://www.cadillacforums.com/cadillac-tech.html

    Study this - correct model/year group - to learn how to get diagnostic codes from the car's built-in scanner - https://www.cadillacforums.com/forum...odes-dtcs.html

    Please update your profile to make your username banner look like those of other members - it helps to know what we're working on ...... thanks.

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