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What Are the Different Types of Codes and How Do They Work? Unlike older keys, modern car keys have specific chips inside that are unique to each car. This helps prevent thieves from simply using the key to start the car. are available at the dealership or cloned at the locksmith's shop. The method of programming the key is different for each manufacturer and involves turning the key to the on position without starting the engine, then removing it after a specific time frame. Transponder Codes When a transpon