I wrote a few days ago that my Jeep wouldn't start. After trying a few obvious things including checking the codes (no codes) I finally had it trucked to the dealer, very inconvenient but free. The dealer checked it and said that the (WCM) Wireless Control Module was faulty, they're on back order for 2 weeks which means it's a common problem but will be replaced with an improved part. They got the Jeep started, gave it back to me and said that if it happens again to pull the large white fuse and wait 10 seconds before pushing back in and that should do it. The fuse box is on the left side of the engine as you're looking at it and the white fuse is right behind another large yellow fuse. It's essentially the same as a computer reboot. Good to know if you're 10 miles and 2 hours into a difficult trail.
Thanks to those who wrote me with suggestions.

Mike in Denver

 

That is good info so thanks for following up.

These electronics will be the death of us