Recently, the power lock buttons on the driver's side seem to have loosened and will not always lock or unlock when pushed. The passenger slide lock buttons still have the tension and I can lock and unlock this side no problem. I checked the door lock fuse, which was fine. Could this be an actuator problem or something more simple? What should this cost to repair?
You really can't tell what the problem is until you take the door panel off and visually look inside.
It can be the actuator but can also be loose linkage rods, loose mounting rivets or even broken metal parts.
Once you or your mechanic get inside, you can get an idea on what is wrong and how much it will cost.
If you need more information on your car, please supply us with more details like the year, exact model, make and engine so we can give you more accurate information.
Let us know how you make out.