Could be your antenna or module....

FWIW, I sent my 2 keys in to Scott recently. One of our keys stopped locked. All funtions worked otherwise. Bad switch on mainboard I suppose.

Other key was flawless, but it would not crank the car.

Both keys have been back for about 2-3 months. No issues sofar.
I knew the pros/cons of this key repair vs. the other options.
My only gripe, just because I'm OCD like that, is that if you look at the key, you can see it's been cut and reglued. Both keys repaired for a benny. Can't complain