When using a dual-filament bulb, the brake filament and width indicator filament burn out, resulting in increased instantaneous current and damage to the module.
The brake light or trunk manual switch is damaged and not replaced in time.
The computer chip inside the body control module is damaged.
Line failure (involving power, grounding and communication lines).
Sensor failure.
The body control module system is confused.
Preventive measures and maintenance suggestions:
Check the vehicle's bulbs and switches regularly and replace damaged parts in time.
Keep the body control module's software and system updated to avoid failures caused by software problems.
Regularly maintain the vehicle's electrical system to ensure that the power, grounding and communication lines are working properly.