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Thread: ABS & TRACTION CONTROL LIGHTS ARE ON!

  1. #1
    bschelle is offline Cadillac Owners Fanatic
    Automobile(s): 2007 DTS, 1991 Eldorado, 1999 Deville (retired)
    Join Date
    Jan 2004
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    Norhtern IL
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    ABS & TRACTION CONTROL LIGHTS ARE ON!

    99 DeVille, 111,000 miles. The abs & traction control lights are on and I lost first gear. The codes are PCM: P0741 History
    P1520 "
    No IPC
    No ACM
    No SDM
    TCS: C1243 History
    No PZM
    IRC: U1255 History
    No RFA
    What do you think the problem is?
    Thanks in advance,
    Bill.


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  3. #2
    Join Date
    Apr 2005
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    Mandeville, Louisiana
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    Re: ABS & TRACTION CONTROL LIGHTS ARE ON!

    It is probably something with the feedback from one of the speed sensors.
    I had the same problem on my 1996 DeVille, and it was a broken wire from the right front wheel speed sensor.

  4. #3
    Krashed989's Avatar
    Krashed989 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 Eldorado, and a 99 ETC
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    Re: ABS & TRACTION CONTROL LIGHTS ARE ON!

    P0741 - TCC (Torque Converter Clutch) System Stuck Off
    P1520 - Transmission Range Switch Circuit
    C1243 - BPMV (Brake Pressure Modulator Valve) Pump Motor Stalled (this caused the lights to come on)
    IRC (Integrated Radio Chasis) U1255 - Class 2 Communication Malfunction (Serial Data Line Malfunction)

    I don't know much about transmissions, but I wonder if P1520 is causing the P0741. I know that P0741 is whats causing you to have only one gear though. Your break pressure modulator valve is connected to the EBTCM (Electronic Brake Traction Control Module) along with its pump. Here's some useful information about the EBTCM and your whole suspension system in general.

    http://www.cadillacforums.com/cadillac-suspension.pdf
    I guess you have to copy and paste it



    Hope this helps
    Last edited by Krashed989; 04-13-05 at 03:30 AM.

  5. #4
    outlaw1369 is offline Cadillac Owners Member
    Automobile(s): 1995 Eldorado 1996 Sedan Deville
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    Aug 2004
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    New York
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    Re: ABS & TRACTION CONTROL LIGHTS ARE ON!

    I have the same problem. Checked the sensors all were ok. Turns out my water pump had been leaking onto the ABS pump and the wiring harness that plugs into the top of the ABS pump has corroded. Just my .02

  6. #5
    Join Date
    Sep 2004
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    Re: ABS & TRACTION CONTROL LIGHTS ARE ON!

    Hey iam getting the same thing ..it would only come on when I would hit a bump so I played ( just unplug it ) with the left front speed sensor wrire and now the light will not go off so I scanned it and its telling me that my left front and right rear speed sensor is not working ...are they both on the same circut ?? any help guys Thanks

  7. #6
    Join Date
    Sep 2004
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    Re: ABS & TRACTION CONTROL LIGHTS ARE ON!

    ok I just went out side and checked the wrire from the left front speed sensor and it was ok ....any ideas

  8. #7
    Supercrew632 is offline Cadillac Owners Member
    Automobile(s): CERTIFIED CADDY TECH
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    Feb 2005
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    MI
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    Re: ABS & TRACTION CONTROL LIGHTS ARE ON!

    It's not the wheel speed sensor. It is an internal transmission problem. Usually a high mileage car. At my dealer we would recommend a SERTA rebuilt transmission. It's telling you the torque converter clutch is not engaging, eventually it will slip enough that you will notice it. Hope this helps, sorry to bear bad news.
    Supercrew632


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