My father had the same fun with his '07 Expedition. Stock Chromie Ford steelies for the winter, each sensor was $165 Cdn. Pain in the butt to program too. It's to bad they couldn't of kept it simple, my wife's '03 Windstar throws up a warning when I put the winters on since the psi is lower, I hit the reset button, done.
It's wasted technology IMO, we should be paying closer attention to our vehicles, not waiting for automated equipment to warn us, especially when the equipment can fail.....