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Had to pull out my ignition but the car will not start..the security. Light is flashing and I think its keeping the car from running..can I bypass this somehow so I can drive the car until I replace the ignition?

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Car will not start unless immobiliser can read key transmission at the ignition switch.

Posted on Sep 14, 2010

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Flashing security light, engine won't start


The security, antitheft, or passlock light 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 misinterperates 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 may help you find ways to bypass this or fix it yourself.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Mar 01, 2013 | Cars & Trucks

1 Answer

I have a 2001 Olds Intrigue that won't start every once in a while. When it won't start the security light flashes so GM told me it was the passcode and I would have to change the ignition switch...


you can not bypass the security in that car, it is built into the main computer, they have problems with the ignition switch screwing up and the only way to start it while the light flashes is to turn the key to ON but don't crank engine, leave on for 10 to 15 minutes until light goes out then start car.

Sep 21, 2011 | 1998 Oldsmobile Intrigue

2 Answers

My trail blazer 2006 wont start and it has a light on of a car with a lock what does this mean heeelp please as soon as possible emergency


You have now experienced GM's terrible anti theft security system. These systems are known for failing and will cost you an arm and a leg to fix. Anywhere from $350 - $700 plus labor. Most mechanics wont even touch these "PASSkey" security systems.You'll have to go to a Dealer mechanic. The good news is that you can bypass these systems permanently. And you're vehicle is one of these lucky ones that CAN be bypassed. This link should help you find what you need and help inform you of how this system works.

http://vatspasslockpasskeysecurityhelp.yolasite.com/ TRAILBLAZER 2002 2003 2004 2005 2006 2007 2008 Effected by Passlock/PASSkey Failure. tayjoejoe_17.jpg

Jul 11, 2011 | 2006 Chevrolet Trailblazer

2 Answers

Hi, My 1997 Monte Carlo will not start. My dad had the breather off to clean it out and decided to pull the car up a few feet onto the driveway so it would be easier to work on, he pulled it up with the...


If the security light is flashing, it is DEFINITELY a security system issue. Intermittent ignition switch failures are common.

First, make sure you are using the correct key for the vehicle. Use a FACTORY key, NOT a copy made at the hardware store. Turn the ignition switch to the ON/RUN position (do not try to start the vehicle yet). If the security light is not flashing, go ahead and try to start the engine. If it does not start, release the key to the RUN position and observe the security light. If it is flashing, wait about 10 minutes until it stops flashing then without turning the key off, turn the key to the start position again. If you are using the correct key it should start. If it does not, your car will have to be towed in for service.

Jun 22, 2011 | 1997 Chevrolet Monte Carlo

1 Answer

My 2007 silverado was fine when i parked it last nite..now it wont start..plenty of battery and lights..but no ignition..and the steering wheel is not locked when in park..it will not start in park, or...


The steering wheel will not "lock" until you turn it about 45 degrees from center...this is normal. If your security light is flashing, there is a problem with your security system that is keeping you from starting the engine. Try this: Set the parking brake. Turn the ignition to the "RUN" position and wait about 10 minutes for the security light to stop flashing. When the light stops flashing, crank the engine without turning the key to the off position. If it starts, take the vehicle to get the security system checked. If it doesn't start, tow it. You probably need a new PassKey sensor.

Feb 22, 2011 | 2007 Chevrolet Silverado 1500HD

1 Answer

I turn the key and the security light flashes


leave the key in the ignition, turned to 'run' (just before the crank position) and leave it there for about 15 minutes-the security light will then stop flashing-so NOT turn it off, turn it to crank and start the car. You have a security module that is not seeing the same resistance in the ignition switch as it expects, meaning you will have to either replace the ignition switch (expensive) or bypass the module (easy and inexpensive)-I have done lots of these, requires about 15 cents worth of parts and can be done in 1/2 hour.

Jan 24, 2011 | 2003 Pontiac Grand Am

3 Answers

Ignition keeps going into security car starts then stalls and security idiot light flashes


ignition switch problems on these cars are notorious, you can bypass the anti-theft module by placing a resistor inline so that the module 'thinks' the correct key is not an attempt to steal the car. the anti theft is located behind the glovebox and the resistor costs 15 cents at radio shack, not as hard to do as it sounds and it fixes it for good.

Dec 23, 2010 | 1997 Oldsmobile Achieva

3 Answers

I start my car but it immediatly shuts off and the theft sys light flashes could this light be the reason?


the ignition swith reads the key chip when key is turned, this is a common problem,the ignition switch will need to be replaced, after replacing the swith reprograming will be needed, to program you will need a battery charger to keep battery from going dead, after installing new switch,turn charger on, turn key to crank then release key leaving ignition on, you will see the dash lights, leave key on for about 15-20 min, until you see theft light go out, if light doesnt go out then repeat process,crank for 2 sec, then leave key on 15-20 mins until security/theft light goes out, hope this helps.

May 09, 2010 | 1997 Pontiac Grand Am

2 Answers

Fiesta Diesel (Y Reg) intermittent starting(flashing immobiliser)


diesel ,,,just bypass the immobiliser ,20mins work

Feb 11, 2009 | 1999 Ford Escort

4 Answers

93 bonneville security light flashing


your key reader is not reading the chip in your key you can either replace the ignition switch cost about 250 dollars parts and labor or i can tell you how to bypass it for less than 20 bucks in premium chat hope this helps
thanks wes

Feb 01, 2009 | 1993 Pontiac Bonneville

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