Major malfunctions 99 STS
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 15 of 43
Cadillac Seville / Cadillac Eldorado Forum Discussion, Major malfunctions 99 STS in Past Cadillac Vehicle Discussion; Last night while driving my car the cruise stopped working properly!! And that's when all type of things started going ...
  1. #1
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47

    Major malfunctions 99 STS

    Last night while driving my car the cruise stopped working properly!! And that's when all type of things started going wrong. Service theft system message popped up, speed limited to 90 message also, service air bag, never seen any of these before, then my car stalls out and cuts off, start it back up cuts off again. The speedo and tach display are bouncing all over the place in idle too.
    This morning go outside and look under the hood under the beauty cover looks the same as it did yesterday morning! Get inside car to start it up it cranks but won't start. Had this problem last month and had Fp fpr ff all replaced and plugs replaced! It was a major pain getting a car that won't start service, anyone ever have these type of problems with the Seville sts

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,908

    Re: Major malfunctions 99 sts

    What's your battery voltage? Have you pulled the DTCs?

  4. #3
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    12.3

  5. #4
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    12.3 just started up. Service theft system message speedo jumping all over the place idling rough almost wants to cut off

  6. #5
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,908

    Re: Major malfunctions 99 sts

    Pull the DTCs. Post them AND their definitions.

  7. #6
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    Ipc u1255- class 2 communication malfunction
    Sdm u1040- loss of class2 comm with abs
    Sdm u1255- class 2 communication malfunction

    Only current codes

  8. #7
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    74
    Posts
    44,144

    Re: Major malfunctions 99 STS

    Instrument Panel Cluster, Sensing and Diagnostic Module - any wiring work or circuit changes ? Strange blown fuses ?

    U codes can also be low voltage codes and hiccups, coupled with your first post...........

    Battery, battery cable terminals (all 4 ends), alternator wiring/connectors, alternator ground (yep, the mounting bolts).

  9. #8
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    Car won't start again service air bags theft system messages,

    Abs c1232
    Abs c1255 ebtcm internal malfunction history
    Abs c1276 delivered torque signal malfunction
    Abs c1298 PCM class 2 serial data malfunction
    Abs c1056 loss of communication with rss
    Abs u1255
    Ipc u1088 loss of communication with sdm
    Sdm b1161

  10. #9
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    My car has worked four out of the last 21 days and has cost me lots of dough for those four days of working somewhat properly. Now it's just sitting there again all the electronics working but no starting again., after just having the plugs replaced. I seemed to have lost out big time on what I thought was a reliable car brand. I wouldnt wish this on my worst enemy, or recommend a cadillac sts to anyone.

  11. #10
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    74
    Posts
    44,144

    Re: Major malfunctions 99 STS

    How long have you owned this car ? From your last post ^^^ it would appear that you have recently bought a well-used car. Did you have the car checked out by a knowledgeable mechanic, take it for a long test drive, and get it up to highway speeds for a while ??

    All your problems didn't just appear overnight - either this car has had maintenance neglected for quite a while or, from some of the strange communications codes, it almost looks like a flood salvage job.

    Have you tried to install an aftermarket sound system ??

  12. #11
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,016

    Re: Major malfunctions 99 STS

    I'm with Sub on this one, you may have gotten someones lemon or neglected "problem".

    You could also just have a bad starter and/or bad ground. The starter is located in the middle of the engine, just under the manifold.

    The biggest grounding wire on the whole car is located from the top alternator housing bolt to the ground terminal located on the frame just behind the headlight. The cradle is largely isolated from the car ground and relys on this for much of the grounding. Check there first...

  13. #12
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    Had my battery checked out at autozone it's holding 12.5 but is only 36% charged

  14. #13
    cadi509's Avatar
    cadi509 is offline Cadillac Owners Connoisseur
    Automobile(s): 2006 STS V Tango int
    Join Date
    Jan 2010
    Location
    Yakima, Wa
    Age
    25
    Posts
    2,093
    I had a problem similar one time in my 99 STS, turns out a fuse was 1/2 blown and wasn't giving the full connection..... Weird I know

  15. #14
    divine97godly's Avatar
    divine97godly is offline Cadillac Owners Member
    Automobile(s): 99 Sts
    Join Date
    Mar 2012
    Location
    Charleston, Sc
    Posts
    47
    Have no spark at the plugs now. I thought ac deco plugs were installed but it was r&r plugs, one of my fuel injector was spraying gas fixed that, have no idea why I have no spark

  16. #15
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,016

    Re: Major malfunctions 99 STS

    IIRC, the ECM controls the ignition system...could be wrong...

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting