What is the reason for one car door not being able to lock?

[StEleanor]

The reasons why one car door cannot be locked are: 1. The door lock actuator and door lock controller are faulty, so it is necessary to focus on checking the door lock actuator and door lock controller; 2. It may be caused by one of the doors not being closed properly. The vehicle computer will prompt through the car's dashboard. In this case, just close the door properly to lock the car; 3. It could also be that the fuse in the switch circuit is blown. A blown fuse will also affect the normal locking and unlocking of the car. If the car door cannot be locked, it is recommended to go to a professional repair shop or a 4S shop for maintenance and inspection, because the repair work is relatively large, and it is not recommended for the owner to operate it themselves. A common fault in car central locking is motor aging. Once the motor shows signs of aging, it needs to be replaced in time, otherwise it will affect the normal use of the car.