Driver door only locks with key. Shake the door and something rattles in the bottom of door. Seems like something broke off.

Something broke inside door probably lock linkage rod inside door panel needs to be disassembled

Probably the plastc clip the door lock rod goes thru broke.

it is not the actuators, try a different remote, you may have an issue with the car security system/body computer not functioning on the unlock driver door command, one press of remote is unlock driver door and 2 presses is unlock the other doors.

you will need to remove the door panel and check out the back of the key lock ,something is broke here thats for sure

If the timing chain jumped or broke you will have no or low compression. Is there spark at the coil? If so is there spark at 2 or more cylinders at the spark plug? Can you here the fuel pump come on when you first turn on the key? Distributor cap and rotor is very common with that Flat cap.

the power lock in that door may have broke the rod. remove the door panel to inspect its operation and replace the necessary part. hope this helps

Same thing happened with mine. It turned out that the power door lock motor went out. Since the handle or the switch can unlock the driver's door, both of these mechanisms are connected. When the door lock motor goes out it freezes in whatever position, it was last engaged.

according to my partsman (who has had great advice for many years), you do not have to remove the door panel to replace the door handle which contains the cylinder lock. the handle is released with a screw which you can see when you open the door. you will need a starhead screwdriver or socket. A new handle costs around $40 at a parts store in my area. call around for a locksmith who will re-key your key to the new lock or use the key which comes with the new lock, your choice. i am in dealing with this also

The driver's side door lock button is designed not to lock from the inside unless the handle is pulled, or the power switch is used. This serves as a reminder to not lock your keys inside.

If you are inside, and push down on the button (not the switch) hard enough to lock it, you've probably damaged it.