Had to do my first 2023 yesterday with the 12+8 and it didn't work initially.
It doesn't seem to work under Hot Function after watching a video I did everything under the Control Unit.
Proper 5 digit pin pulled and programmed on 3rd attempt.
Finicky antenna system.
video that helped:
https://www.youtube.com/watch?v=ZTJqLrvj5UM