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My dash keeps saying theft system problem ,car may not start .what do i do ,and how do i fix it .i have an 1999 caddillac deville de'elagance

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Dealer only ,encrypted software for the immobilisor

Posted on Sep 29, 2010

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When I turn the key the horn blows and keeps blowing and the dash says the car may not restart


It's the anti theft system turning on. You most likely need to take it to the dealer to get it fixed. Sorry.

Aug 31, 2010 | 1999 Cadillac DeVille

2 Answers

Security system problem car may not restart


if you have an anti theft syestem you need to take it out or by pass it if its lojack good luck but if its an other kind i could help you out

Apr 02, 2010 | 1999 Cadillac DeVille

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THEFT SYSTEM PROBLEM


u need the owners manual. it tells how to change the theft deterrent system.

Oct 05, 2009 | 1998 Cadillac Seville

1 Answer

Won't start, message displayed says - Starter disabled.


Anti-theft system activated. Possible bad anti theft module to bad key(has a micro chip in it), to bad ECM (cars main computer)
Dealer repair due to reprogramming needed for anti -theft system

Jul 17, 2009 | 1999 Cadillac DeVille

1 Answer

It wont start because it says anti theft system trouble


I had the same problem in my 99 Deville. None of the GM dealerships could fix it. It's a problem in the computer and only a Cadillac dealer can fix it. I figure it's a "give your dealership money" code. Don't remember the price, but it was around a couple hundred at the most.

Jul 05, 2009 | 1999 Cadillac DeVille

1 Answer

I have a 97 caddy on dash a message enable to start due to auto


have you tried to get your key looked at??
maybe the resistor on it is no good anymore,
or maybe the wires for this system are damaged,
they are two skinny white wires inside an orange sleeve
(that's how it is on my 97 deville)
check under the dash.

May 07, 2009 | 1999 Cadillac DeVille

2 Answers

'97 Cadllac Deville Concours reading "Anti Theft System Problem"


I had the same problem. trying to save money i took it to several auto places who thought they could fix it..... after a lot of money and my 800.00 after market alarm was taken off i had it took to the dealer . They fix it in two hours they put in new switch and key haven't had any problems sence.

Apr 13, 2009 | 1997 Cadillac DeVille

1 Answer

1997 cadillac deville delagance - anti theft device


I've got a 97 deville d'elegance that has issues similar to these. Last year the red anti-theft light came on and the car wouldn't start-took it to the dealership and they replaced the PCM? (the main brain for the system) for $900...the guy told us the wiring was so corroded he didn't want to mess with it much. Today the message started flashing on the dash that says "anti-theft problem/ car may not restart" but it still turned over in the driveway a couple times so I am hoping I can reset it. The wiring system is jacked and will probably need to replace the wiring harness completely. Doubt its worth it. Not a secure feeling with 2 babies in the back seat in the middle of winter....

Mar 30, 2009 | 2001 Cadillac DeVille

1 Answer

1994 cadillace anti theft system


I just had this same problem with a '96 . do you have a vats key in your '94? you need to bypass the VATS system. read some of the blogs on this site and it will tell you how to do it. I fixed mine with a $2 resistor from radio shack.

Oct 08, 2008 | 1994 Cadillac DeVille

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