Have been having this issue also. I rotated my tires and the error followed the sensor. I assume my issue is a bad sensor. Just havent swapped it out yet. I dont drive the truck more than 30 minutes that often so i hardly ever get the fault. From what i have read, The tpms polls the sensors every 20 minutes or so. So unless i drive more than 30 mins straight, I dont get the error. If i hd to guess the battery is getting low in the sensor and putting the sensor into deep sleep mode.