Cadillac STS FAULT CODES

Tiny
KHANNA
  • MEMBER
  • 2008 CADILLAC STS
  • 2,000 MILES
Cadillac STS 2008 V6 3.6, showing 'service theft system' warning but running ok. Then suddenly engine. Not cranking. Cranking once in a 100 attempts but showing 'reduced engine power' resulting in misfiring and not going beyond 1500 rpm.
Analysed on MDI COMPUTER, showing fault codes : U0100, U2105, U2106, U2120. Strange, because is virtually a brand new car, done 2,000 km only. It's a RHD CAR, bought from UK, AT ZERO KM IN 2010.
Monday, August 13th, 2012 AT 7:34 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
The u codes are body codes for the security system. Try another key and see if it woeks, if not you need a shop to help you out

Roy
Was this
answer
helpful?
Yes
No
Monday, August 13th, 2012 AT 8:09 PM
Tiny
KHANNA
  • MEMBER
  • 7 POSTS
Thankyou Sir, will try tmrw morning as it night in India now
Was this
answer
helpful?
Yes
No
Monday, August 13th, 2012 AT 8:14 PM
Tiny
KHANNA
  • MEMBER
  • 7 POSTS
Today the car cranked but the engine was facing the following problems
1). Engine Check Light ( Engine Symbol ) steadily On.
2). Displays : Engine Power Reduced.
3). Displays : Service Theft System.
4). TC Light On.
5). RPM Not Going Beyond 1,500.
6). Burning Smell started within 3 to 4 mins, and
7). Battery Positive Cable became quite Hot.

Switched the engine off.

The car starts once in a few days like this, and � all, or some of the above things happen.
Then car does not start again
Was this
answer
helpful?
Yes
No
Wednesday, August 15th, 2012 AT 10:32 AM

Please login or register to post a reply.

Related Engine Computer Limp Mode - Reduced Power Content

Reduced Power - Limp Mode
GUIDE
Reduced Power - Limp Mode
The com­puter sys­tem that con­trols your car has a built in safety fea­ture called "Re­duced Power" or "Limp Mode" which is de­signed to get the car where it is...
VIEW MORE