What are the reasons for the failure of the Buick car anti-theft system to start?

1 Answers
AidenLee
07/25/25 11:09am
Buick car anti-theft system failure to start may be caused by a damaged anti-theft module, a damaged car key chip, or a dead car key battery. Damaged Anti-theft Module: After the vehicle is turned off, the anti-theft module cuts off the engine ignition circuit to prevent the vehicle from starting, achieving anti-theft purposes. When the vehicle's anti-theft mode is deactivated, the engine ignition circuit is restored, allowing the vehicle to start normally. If the anti-theft module malfunctions, the engine ignition lock cannot be properly released, resulting in the vehicle's inability to start normally. The anti-theft module needs to be replaced. Damaged Car Key Chip: When pressing the car key button to lock or unlock the vehicle, the car key emits a signal. The vehicle receives the signal, and after matching and authentication by the onboard computer, the locking or unlocking action is completed. If the car key chip is damaged, it cannot deactivate the anti-theft system to start the vehicle normally. The damaged car key needs to be replaced. Dead Car Key Battery: A dead car key battery will also prevent it from emitting the unlock signal to deactivate the vehicle's anti-theft system, causing the vehicle to fail to start normally. The car key battery needs to be replaced. The car key battery is a consumable item and is not covered under the vehicle's warranty.
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