All right so here's the jist, of it, my car has factory remote start and factory tire pressure monitoring system. The tire pressure monitoring system is displaying -- for all tires, and the key fob simply won't work. i've replaced battiers in both key fobs, and have checked any other fuses. hopefully someone on this site has some feed back.

 

A possible fix is to check and make sure the solder connections on the battery mount are good. I had the problem and it;s was a bad contact. Re-soldered it and it works.