Please help my STS is throwing about 90 codes! and wont go over 65mph
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Please help my STS is throwing about 90 codes! and wont go over 65mph in Past Cadillac Vehicle Discussion; Okay, So, I bought a 1999 STS from my friends father, and it has some major issues. Ill list the ...
  1. #1
    Zippoz is offline Cadillac Owners Member
    Automobile(s): 1999 seville N*
    Join Date
    Aug 2011
    Age
    30
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    4

    Exclamation Please help my STS is throwing about 90 codes! and wont go over 65mph

    Okay,

    So, I bought a 1999 STS from my friends father, and it has some major issues.
    Ill list the major ones first, then all the codes that came off of it.

    1)Says speed limited to 90mph, but cuts the fuel off at around 60 while in D. If select "3" on the shifter it will go up to 90 then cut off. (only did it once to test)

    2) the Stability system goes off on turns, and brakes

    3) occasionally when I get in the car and start it, the windows, stereo, and lights for the window switches will not be functional. if the stereo lights up the clock will show 12:00 while this is happening. Sometimes it goes away on its own after a few seconds, and sometimes it have to restart the car. Occasionally it will happen while driving.

    4) it burns about a quart of oil every 150 miles.

    I ran the codes on the vehicle, and there were so many, i couldnt keep up with writing them all down. I decided to video tape them, and then play them back and pause and wright them all down as it happened. I did upload the video to youtube (5 minutes long) and you can see it here if you would like.

    [YOUTUBE]http://www.youtube.com/watch?v=ionqEkkE7mE[/YOUTUBE]

    The codes are seperated by system, listed chronologically, and have either a C, or an H after them to indicate Current or Historical.


    Any help anyone can give me would be greatly appreciated. While the previous owner was unable to fix this car up, I would love to bring her back to her original glory if i can.

    ABS C1252
    c1253
    c1281h
    c1283h
    c1286 h
    c1287 c
    c1298 h
    u1255 current

    AMP
    U1255 h
    U1016 h
    U1064h
    U1128 h

    DDM
    u1064h
    U1065h

    DIM
    B1390h
    b1982 C
    B1983 H
    u1300 H
    U1065H

    IPC
    B1982H
    U1301H

    IPM
    B1340H
    B1652H
    B1982C

    IRC
    B1982C
    B1983H
    U1129H
    U1064H
    U1065H
    U1160H
    U1016H

    PCM
    P0440C
    P0503H
    P1602H
    P1604H
    P1611C
    P1612H
    P1613H
    P1614H
    P1615H
    P1626H
    P1652C

    RFA
    U1255H
    U1300H

    RIM
    U1255H
    U1064H
    U1160H
    U1065H
    U1016H
    U1096H

    SDM
    B1163H
    U1301H
    U1096H
    U1064H
    U1016H
    U1040H
    B1328C

    VTD
    B1327H
    B1328C
    B3055H
    U1064H

    MSM
    U1000H
    U1305H
    U1160H
    U1064H
    U1016H

    TTM
    U1300H
    U1160H
    U1064H
    U1016H
    NO RSS DATA

    Prom ID
    ABS PROM ID 7208
    AMP PROM ID 840C
    DDM PROM ID 0812
    DIM PROM ID 8270
    IPC PROM ID 8087
    IPM PROM ID 6719
    IRC PROM ID FB97
    Not Supported By PCM
    RFA PROM ID 8070
    RIM PROM ID 8412
    SDM PROM ID 9810
    VTD PROM ID 8190
    MSM PROM ID 9312
    TTM PROM ID 8250
    No RSS DATA

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  3. #2
    MacMuse's Avatar
    MacMuse is offline Moderator
    Automobile(s): 2006 STS N* 1SE
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    Moving to Seville forum where you'll get more help.

  4. #3
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
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    Re: Please help my STS is throwing about 90 codes! and wont go over 65mph

    Lots of loss of data and communications codes. Start by checking your battery voltage with the engine off. Low voltage can cause all sorts of electrical problems and false codes. You may have some "real" codes in there as well, but check the voltage first.

  5. #4
    jcresciSTS is offline Cadillac Owners Enthusiast
    Automobile(s): 1999 Cadillac Seville STS (November 2012, 183k)
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    Re: Please help my STS is throwing about 90 codes! and wont go over 65mph

    Yeah I was going to say battery check. Holy moly though, 229k on it! Is that the original engine/tranny?

  6. #5
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: Please help my STS is throwing about 90 codes! and wont go over 65mph

    Might want to clear those codes and drive for a day or so. Then pull the codes, and repost them AND their definitions. No one has them memorized.

  7. #6
    01ssreda4 is offline Cadillac Owners Fanatic
    Automobile(s): 99 STS VIN 9
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    Re: Please help my STS is throwing about 90 codes! and wont go over 65mph

    OP, ever find out what was the issue?

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