It depends on the vehivcle. Many of the newer (post 1970) models contain redundant wiring and features like locking steering wheels so that even if you manage to start a car without the key, it won't shift into gear or allow you to steer it. Typically you can try hammering a flathead screwdriver into the key slot and forcing it to turn with some bicep action and a pair of vicegrips. Alternatively, you could unbolt the steering wheel, dissasymble the column, and replace all the parts with new ones you have a key for.
Are you talking about the Pass-Key system? because the only real way to bypass it is to put in a new ignition.
I don't think you can bypass them.
You can't bypass or reset security system, bring it to the dealer.
The cost of doing this would be more time consuming and more expensive than going to a locksmith or a dealer and getting a key with a chip.
get the key and insert said key to ignition, once inserted turn ignition to the right and BAMM your on your way.
If you bypass the VATS, it won't care about the type of key at all. It will use any type of key as long as it's correctly cut.
buy a DFVATS Bypass Module from www.bakerelectronix.com
Possible a bad computer chip on your car igition key or you may have to get a mechanic to reset the sequrity code for you. Try a different ignition key before you do anything else. The chip is that little black thing that's on the side of your key. I had a mechanic bypass my security in the ignition.
You have to put the car into program mode, usually you can order an new keyless entry and it has the instructions. If you are talking about the ignition key security, you will have to buy a remote start for the car as this will bypass the resistor in the key.
GO to www.vatslikeabigdog.com it tells all about how to bypass the VATS key system with pictures and all.
your car ha s vats is there a chip built on you ignition key? if so clean the key with a clean rag and alcohol the chip is a resistor if dirty it changes the resistance and security system rejects key this system has a ton of problems they make a bypass kit for this look on line for vats bypass kit
how do you bypass the anti theft security chip key if your only key is bad or if you have no key at all please help