DTS shuts off while in idle!
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, DTS shuts off while in idle! in Past Cadillac Vehicle Discussion; I have a 2003 Deville DTS and just about 2 days ago my car just turned off while I was ...
  1. #1
    Robp is offline Cadillac Owners Member
    Automobile(s): '03 Deville DTS
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    DTS shuts off while in idle!

    I have a 2003 Deville DTS and just about 2 days ago my car just turned off while I was at a red
    light. Now everytime I turn the car off and start it again I can barley put it gear and it turns off.
    Anyone have a ideas or suggestions as where to start troubleshooting. Thanks

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: DTS shuts off while in idle!

    Pull the DTC's.

  4. #3
    Robp is offline Cadillac Owners Member
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    Re: DTS shuts off while in idle!

    I pulled the DTC's and this is what I got from them 1st ones are PCM P0106 history P0420 current P0506 current P0507 history. Next are IPM B0248, B0408, B0423, B0428 all current. IPM B1004 history. Any help would be nice. Thanks again!

  5. #4
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Codes are meaningless without their definitions.

  6. #5
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    Submariner409 is offline If it won't run, chrome it
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    Re: DTS shuts off while in idle!

    use this ..................... We haven't memorized them all - yet.

    http://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

  7. #6
    Robp is offline Cadillac Owners Member
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    Re: DTS shuts off while in idle!

    PCM P0106= MAP system performance history, P0420 Catalyst system low efficiency current, P0506 Idle speed low current, P0507 Idle speed high history. Here are the DTC's any input will help! Thanks again! I listed the codes that are current and history not sure if that matters.

  8. #7
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Yes, weather the codes are current or history matters.

    Looks like a faulty MAP sensor. Check for wiring/connector problems first. Not a common failure, a used replacement would be acceptable.

    Look through subs albums for it's location.

  9. #8
    JimD is offline Cadillac Owners Connoisseur
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    Re: DTS shuts off while in idle!

    Quote Originally Posted by Robp View Post
    I have a 2003 Deville DTS and just about 2 days ago my car just turned off while I was at a red
    light.
    What does "car just turned off" really mean? Did the engine just quit running while idling? Your codes suggest the idle speed varies between LOW and HIGH.

    Before you go chasing any exotic diagnostic procedures and high $$ parts replacement, try this simple routine maintenance procedure.
    Remove the intake air plumbing pieces to gain access to the throttle body.
    Use a screwdriver handle or a small scrap of wood to hold the throttle body blade wide open.
    Using throttle body cleaner fluid, soft rags, and a toothbrush, scrub the throttle body bore surgically clean.
    Pay attention to the cleanliness of the perimeter of the throttle body blade.
    You will see a small diameter passage that allows air to flow around the (closed) throttle body blade; make sure that passage (idle air control) in also clean.

  10. #9
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: DTS shuts off while in idle!

    Based on those DTC's I too would suspect the MAP sensor, but a good TB cleaning sure can't hurt and should be part of your routine maintenance anyway.

  11. #10
    Robp is offline Cadillac Owners Member
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    Re: DTS shuts off while in idle!

    Thanks for all the input guys! I will check it out when I get off of work!

  12. #11
    Robp is offline Cadillac Owners Member
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    Re: DTS shuts off while in idle!

    It looks like cleaning the TB and IAC took care of the problem! But what about all the DTC's that came up should that have taken care of all the rest or am I going to have problems in the future?

  13. #12
    JimD is offline Cadillac Owners Connoisseur
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    Re: DTS shuts off while in idle!

    Quote Originally Posted by Robp View Post
    It looks like cleaning the TB and IAC took care of the problem!
    Well done.
    But what about all the DTC's that came up should that have taken care of all the rest or am I going to have problems in the future?
    IF you used this method to display your diagnostic codes, you can also use the same method to clear all the diagnostic codes (current and history).
    http://www.cadillacforums.com/forums...odes-dtcs.html


    That will give you fresh sheet of paper and you can relax until or if other codes appear in the future. In the meantime, enjoy your ride.

    BTW: is La Fogata still in business?

  14. #13
    Robp is offline Cadillac Owners Member
    Automobile(s): '03 Deville DTS
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    Re: DTS shuts off while in idle!

    Thanks I will cleaf them up! And hopefully I will be good to go! Yes it is still up and running! Good eating there!

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