What are the reasons why the car remote key cannot unlock the door?

[PaisleeAnn]

Reasons why the car remote key cannot unlock the door: 1. Check the battery: There are usually two possibilities—either the car battery is low on power or the key battery is dead. Regardless of the next steps for handling or repair, the first priority is to use the spare mechanical key to open the door. 2. Inspect the remote lock: First, check if the indicator light on the remote flashes when attempting to unlock. If it doesn’t flash, the issue lies with the remote itself. If it flashes but the central locking system doesn’t respond, troubleshoot the unlocking circuit of the central lock. 3. Examine the electromagnetic lock: Use the key to lock the driver’s door and check if other locks engage. Remove the front driver’s door panel to inspect whether the electromagnetic lock is properly positioned and verify if there are any issues with the metal linkage inside the door.