2002 hyndai sonata locks

This is my first post. I have a 2002 hyundai sonata. The remote doesn't work consistently anymore, neither does the spare. Also when I manually unlock the driver door, normally all the doors would unlock, but now only the drivers door unlocks. The interior unlock button does not work. Before the locks went out, the door locks would rapidly lock and unlock several times even while driving, and occasionally with the engine running, the key in the ignition, the doors would lock and could lock us out of the car. Normally if the key is in the ignition, it shouldn't lock. Could it be an acctuator or remote sensor? Any suggestions would be appreciated. Thanks.

hi Montyhend, welcome here

Have you checked the power lock relays behind the dashboard? If they are faulty they might need to be replaced.