Question about 2005 Buick Century

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Can't start car at time

When security light come on I can't start it until security reset itself

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The security picture is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Feb 12, 2014

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Posted on Jan 02, 2017

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SOURCE: Security light on

yes . the lock has a sensor in it that sees the key its either the sensor or the key its self . on this car most the time the wires to the sensor that run down the colum are the problem

Posted on Jun 12, 2009

  • 355 Answers

SOURCE: car will not start until you reset the security

if your security system is a PassKey or PassLock, there is a detailed write-up here: http://vatspasskey.com . The guy is great, this was the only way I was able to save my Park Avenue.

Posted on Apr 25, 2010

  • 355 Answers

SOURCE: car doesn't start, security light goes on, if I wa...

The security system (VATS/PassKey) is faulty. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.

Posted on Jun 18, 2010

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