Why Does My Car Keep Locking Itself?

February 18, 2024

With today's cars getting more complex and having all kinds of different sensors, it isn't a surprise that some of these systems can malfunction. One of these malfunctions is car doors locking or unlocking themselves at random times, which can be quite annoying and a security risk as well.

Fortunately, there are some easy ways you can solve this problem and get your car to lock only when you want it to. First, make sure all of the doors and trunk are completely shut. If any of these are ajar, your car will most likely have a warning light that lets you know that a door is open and it needs to be closed.

If that isn't the case, it may be time to replace your key fob battery. This could be the reason why your car is constantly locking itself and causing other issues such as the dashboard lights flickering or failing to turn on. This is because the key fob sends signals to your car's locks, which it then transmits to the door control unit.

The other thing that can cause this issue is a faulty door sensor. These are prone to fail, especially in extreme cold temperatures, which can make the mechanical components freeze and then break down. If that is the case, you'll need to clean or replace the sensor.

The final cause of this issue is that your doors might be locked even though you've clicked the button on your key fob to un-lock it. This is because the door control unit might have been programmed incorrectly. The solution to this would be to have the dealer hook your car up to a computer and correct the programming.


Traffic Dave is on a mission to help traffic engineers, transportation planners, and other transportation professionals improve our world.
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