
Here are the specific reasons why the car door cannot be locked: 1. Remote control issue: When using the remote key to lock the door, it is likely that the remote lock is malfunctioning or factors such as aging of the car's remote transmitter antenna are causing the remote key to fail. In this case, the spare mechanical key can be used for locking. 2. Magnetic field interference issue: If there is strong magnetic signal interference around the car, the smart key, which uses low-intensity radio waves, cannot function properly under magnetic interference. If the vehicle frequently fails to lock remotely in a certain location, the owner should be wary of door jammers, as some criminals use a radio signal jammer that can emit electromagnetic waves at the same frequency as the locking signal, thereby blocking the electronic code of the car's central lock and temporarily disabling it.

Oh, I've encountered the issue of the Roewe 550 not locking quite a few times. The most common reasons include the key remote battery being dead—you'll need to replace it with a new one. Additionally, if the car doors aren't closed properly, it can also cause the locking to fail, especially if the trunk or a door is loose. A blown fuse is another common issue; you should check the corresponding fuse in the main driver's fuse box to see if it's intact. Faults in the electronic control module, such as a bug in the body control computer, might also cause this problem, in which case a diagnostic tool is needed for inspection. I recommend regular maintenance of the key and door lock system to avoid temporary troubles affecting travel safety—small issues ignored can lead to major delays.

My family owns a Roewe 550, and once the remote locking failed after parking. I found it was due to remote signal interference. Parking near high-voltage power lines or in shopping mall garages often causes environmental interference that disrupts the remote. A depleted key fob battery is another major cause - just open it up and replace the CR2032 battery yourself. The door sensor might malfunction and fail to detect that the door is properly closed, so try closing it a few more times. If manual locking with the key still doesn't work, the locking mechanism might be jammed or there could be a short circuit. I always keep a spare key handy for emergency manual locking to avoid hassle. Remember to check regularly to prevent issues - the older the car, the more maintenance attention it needs.

I have dealt with lock malfunctions in the Roewe 550, where the electronic system is the core factor. Weak signals due to low battery power in the remote can be easily resolved by replacing the battery. If the car door is not tightly closed, causing sensor feedback errors, manually pushing it shut will suffice. The fuse under the dashboard is prone to blowing; check the corresponding fuse number and replace it. If the control module malfunctions, professional diagnostic equipment is needed to connect to the vehicle's computer for a refresh. It's advisable to carry a mechanical spare key daily to ensure basic locking functionality remains intact.


