* Power locks not working: This could be due to a blown fuse, a faulty actuator in a door, a problem with the power lock switch, or a malfunction in the central locking system. Check your owner's manual for fuse locations and diagrams.
* Remote key fob not working: The battery in your key fob might be dead, or the fob itself might be malfunctioning. Try replacing the battery first. If that doesn't work, you might need to reprogram the key fob (this usually involves a specific procedure detailed in your owner's manual).
* Doors locking/unlocking unexpectedly: This could be caused by a faulty switch, wiring issue, or a problem with the body control module. A mechanic would likely be needed to diagnose this.
* Aftermarket alarm system issue: If you have an aftermarket alarm installed, the problem might be related to its settings or a malfunction within the system itself. Consult the alarm system's documentation or a professional installer.
In short: You need to describe the *specific problem* you're having with your doors to get helpful advice. Consult your owner's manual first, then consider seeking assistance from a qualified mechanic if the issue persists.
