Can You Program Your Own Car keys programmed?
Only a few vehicles that are available allow you to program keys by yourself. This is a risky procedure that could damage the computer in your car.
The transponder chip inside the key programmers creates a digital signature. The car has a library of these signatures and matches them up to start the vehicle.
How to Program a Keyless Entry System
With a key reprogramming fob key programming you can lock and unlock your vehicle without the use of the traditional car keys. It transmits radio signals to the vehicle, that activate the locking system onboard and ignition. The signal allows the car's identification to be read so it can determine that you are near enough to be able to open the trunk and doors.
The systems can be programmed at home, but the procedure may differ between different manufacturers and vehicles. Some manufacturers use a simple RF (radio-frequency) reprogramming method while others require special equipment to access the system's internal memory.