Anti theft system preventing car from starting

1999 CADILLAC DEVILLE
187,000 MILES • AUTOMATIC
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TONYA HUDSON2
  • MEMBER
  • 15 POSTS
Went into the store to grab a bag of ice came back to the car and tried to cut the car on and the car would not start it only clicks. On the dashboard everything comes on and says "Anti Theft Security System Problem, Car May Not A" on the dashboard. Please give me a solution to this problem.
May 9, 2021 at 7:39 PM
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ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good evening,

The first thing I would do is check the battery. Low voltage will cause this issue.

https://www.2carpros.com/articles/symptoms-of-a-bad-car-battery

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/car-battery-load-test

If the battery tests okay, then I attached a guide for the security system reset. Try this only if the battery is 12.4 to 12.6 volts:

https://www.2carpros.com/articles/how-to-reset-a-security-system

Roy
May 9, 2021 at 8:11 PM