2007~2015 Advanced Key less Entry not operating

:
CX9
All,

I have a 2014 CX9 with the Advanced Key less Entry. The key less entry and key less starting has stopped working. My wife lost one of the key fobs, so I cant tell if it is the fob or something else. I have read on this forum that the Key less entry antenna often is a reason for the doors not opening, but would that apply to starting as well? I also have read that there is no way to reprogram the key fob one place and that disconnecting the battery would reset the fob on another...I replace the battery in the fob and the light on the fob blinks when a button is pushed.

I took a look at the rear antenna and cleaned it off just in case...didn't do anything..

Thoughts?

Thanks in advance for your help.
 

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