Question about 2005 Buick Century
When security light come on I can't start it until security reset itself
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.
Posted on Feb 12, 2014
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Posted on Jan 02, 2017
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
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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Jan 04, 2016 | Cars & Trucks
Aug 06, 2011 | 2002 Chevrolet Monte Carlo
Let the car sit undisturbed for 10 - 15 minutes, then try to start it. Check the owners manual if you have it. Sometimes, on various cars letting them sit awhile will allow the system to reset itself. On others sometimes rapidly turning the key from off to on, without turning to start 3 to 8 times within 10 seconds and then on the last turn to the on position leave it there until the horn chirps, at that point turn the key directly to start, or turn off first and turn to start. If all this fails, a GM dealer can reset the system.
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