What causes the buzzing sound after starting the car?

[EvangelineMarie]

Car starting with a buzzing sound is due to the excessive sensitivity of the anti-theft device. Below is the relevant introduction about car automatic alarms: Excessive sensitivity of the anti-theft device: Generally, the most common reason for the car's anti-theft horn to sound automatically is the excessive sensitivity of the anti-theft device, which causes the alarm to be triggered even with slight vibrations. If it is confirmed that there is no risk of theft, no active people, animals, or objects inside the car, the sensitivity can be adjusted to a lower level. Issues with anti-theft components or circuits: Another reason is the system's false alarm triggered by problems with the anti-theft device components or circuits. It is necessary to promptly go to a repair facility for an electrical system inspection. After identifying the problem, repair or replacement can resolve the issue.