My Key Fob died and when I leave the vehicle I lock the doors from the inside. When I open with my key the alarm goes off until I insert the key and turn on the vehicle. This is a major pain.

I have 2 keys, I thought maybe it was a battery issue so I changed both battery's. Still not change. I went to a mechanic and he programmed both remotes again. Still the key fob would not work.

What could the issue be, new battery's, programmed remotes and still not working to unlock the door, hatch, or lock the doors.

What can I fix to resolve this issue.

2005 Pacifica Touring

 

Its pretty complex, see attach. Lots of opportunity for something to go wrong. Because you recently changed out the RKE keyfob battery you probably just needed to re-sync the Rolling Code to communicate with the SKREEM module, top of page 18. Not sure what your "mechanic" did, but hope he did not screw the pooch with his reprogramming exercise.