Why Can't the Car Start When the Anti-Theft Lock is Engaged?

[JacksonMarie]

There are several reasons why a car might not start when the anti-theft lock is engaged: 1. The car has an engine immobilizer system: The vehicle can only be started if the chip inside the key matches the code in the anti-theft system. 2. The spare key does not contain a chip: The spare key, which lacks a chip, cannot start the car and is only meant for unlocking the doors when the primary key is lost. 3. The car's ignition keys have been reprogrammed: When adding or reprogramming keys, all keys must be reprogrammed. If any key is not reprogrammed, it will automatically become invalid.