What are the reasons for being unable to open the car door from the outside?

[McIsabella]

Here are the specific reasons why a car door lock cannot be opened from the outside: 1. The central locking system is activated: When the door cannot be opened, you can first use the car key to unlock and then lock it again, repeating this process twice. Then locate the central lock button on the left front door trim panel in the driver's compartment and press the unlock button. 2. The child lock is engaged: Most vehicles have a child lock on the rear doors. You will need to use a flathead screwdriver to turn the child lock to the off position. 3. The door lock cable is malfunctioning: If the door cannot be opened from the inside, it may be due to a faulty cable, which directly affects the lock mechanism's ability to open. 4. The door hinge or lock post is deformed: If the door has been subjected to external force, it may cause deformation of the door hinge and lock post, which is another reason why the door cannot be opened. In this case, the only solution is to dismantle both the door and the hinge, replacing them with new hinges and lock posts to restore normal door operation.