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What Are the Different Types of Codes and How Do They Work? Modern car keys have unique chips that are specific to each vehicle, unlike older keys. This stops thieves from taking the key and putting it in the car. The keys are available at an auto dealer or copied in a locksmith's shop. The procedure of the manufacturer differs, but it involves turning the ignition key to the "on" position, without beginning the car, and then removing the key after the time frame. Transponder Codes When a transponder is interrogated it s