2003 Acura RSX Driver's side door lock and remote entry

All the sudden my remote to unlock my car, is not working on the drivers door lock only. It works on the passenger and hatch, plus the alarm system. I can also unlock the door using my key so I do know the function of the lock does still work. Do you think this is just a short or wire that may have disconnected? The dealer said they would need to pull the door panel off to see what is going on, so they need it for a day. I'm just concerned about any hidden cost, because of it being just that lock I can't imagine it costing very much to fix it.