I just took my truck in because on 5/12 while my wife was driving the truck the tpms light came on and stayed. On friday 5/15 I went to a local tire dealer and had nitrogen put in my tires(it was on $22) and went to my local dealer to set an appointment to get the truck checked out which was today 5/18. The tech did the check said he reset the sensors because 3 of the 4 had gone to sleep, the service rep told me because Toyota didn't put the nitrogen in that they probably only replace one sensor but not others. This kind of caught me by surprise because this was brought to their attention the day the light came on, the nitrogen was done after the fact. I would think the nitrogen would be like an exhaust change or adding a cai, am I wrong thinking like this?