What is the issue when the Regal suddenly fails to start and displays an anti-theft system warning?
2 Answers
The reasons could be whether the steering wheel is in a locked position or whether the gear was not returned to the P position when parking. Steering wheel status: The steering wheel is in a locked position. The solution is simple: just turn the steering wheel forcefully while turning the key, and generally, the steering wheel lock will be released quickly, allowing the ignition to happen instantly. If the gear was not returned to the P position when parking. Imagine if the vehicle could start in D or R gear—the sudden movement of the vehicle at ignition would undoubtedly pose a significant safety hazard. Therefore, for automatic transmission vehicles (AT, CVT, AMT), manufacturers preset this mode and repeatedly emphasize in the manual: ensure the gear is in the P position when starting. One-button start: With the one-button start, you might sometimes encounter the issue of the smart key running out of battery. Even though the key is inside the car, the dashboard may display a 'key matching error.' This situation is likely due to the smart key's low battery, causing the start system to fail to detect the weak signal emitted by the key. It is recommended to place the smart key directly on the start button and then press the button to start the vehicle.
A few days ago, I encountered a similar situation where my Regal suddenly wouldn't start and triggered an anti-theft system warning. This is mostly caused by issues with the key or the anti-theft module. If it's a smart key, a dead battery might prevent the anti-theft system from recognizing it—try replacing it with a new battery. For mechanical keys, the key slot might be dirty; clean it or try using a spare key. Faults in the anti-theft module, such as a broken induction antenna or a short circuit in the power line, can also cause the vehicle system to lock and prevent starting. The worst-case scenario is a malfunction in the anti-theft control unit, which requires a diagnostic scan at a 4S shop to read the fault codes for repair. Additionally, a weak car battery might falsely trigger the anti-theft warning—it's advisable to check the battery condition with a jump-start. Parking near strong interference sources, such as large electrical appliances, can also disrupt the anti-theft system and prevent ignition. Safety first—avoid forcing a start and call for professional roadside assistance or a tow truck instead. Regular key maintenance, avoiding exposure to sunlight or water, and timely repairs when the anti-theft light comes on can prevent being stranded late at night.
