Cadillac STS FAULT CODES

2008 CADILLAC STS
2,000 MILES
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KHANNA
  • MEMBER
  • 7 POSTS
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 .
Aug 13, 2012 at 7:34 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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
Aug 13, 2012 at 8:09 PM
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KHANNA
  • MEMBER
  • 7 POSTS
Thankyou Sir , will try tmrw morning as it night in India now
Aug 13, 2012 at 8:14 PM
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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
Aug 15, 2012 at 10:32 AM
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