Why Can't the Spare Key Start the Car?

[OFrank]

Spare keys cannot start the car because the vehicle is equipped with an engine electronic anti-theft system. The car can only be started when the system recognizes a chip inside the key that matches the code stored in the anti-theft system. Since spare keys do not contain such a chip, they cannot start the car. Below is some relevant information about the engine electronic anti-theft system: Introduction: The engine electronic chip anti-theft system is a manufacturer-level anti-theft measure, and most passenger cars use this method as their original anti-theft device. Advantage: The digital password has an extremely low repetition rate, and the password key must make contact with the car's password lock to unlock, eliminating the risk of being scanned. Most new domestic cars are already equipped with the original factory chip anti-theft system.