1. TPMS seems to have active monitoring. What I mean is that when one of my tire started loosing air, it alerted me right away.
Long story: I started out with 36PSI cold. IIRC, it gets to 40-42PSI while driving. I got an alert around 34PSI to pull over and inspect tire. I.e. it wasn't just low tire pressure warning. It spelled out that front passenger tire needs to be looked at right away when it is safe to do so. This was helpful because I was able to slow down and drive to a gas station few miles down the road. Big part of tread was missing so I had to put on my spare (my 4th flat in as many months
2. Big brother is watching you. I got an email a day after from my local servicing dealer to get the TPMS alert looked at.
Long story: I put on my full size spare and continued to Myrtle beach still 300 miles away. This was around 5PM day before Thanksgiving. Everything was closed for Thanksgiving so the spare stayed on for couple of days. I suppose the alert stayed long enough for the dealership to make an effort to send me an email.
Btw, when I got my extended warranty couple of months back from Jerry, he was able to get my current mileage sitting far away in Hutchinson, KS. I have extended my remote connect and emergency connect. I suppose it could have been Service Connect too which is standard for first 3-4 years??
3. TPMS goes blank for all wheels if just one of the tire doesn't have a sensor.
Long story: TPMS went all blank when I put on my full size spare without a sensor. It stopped showing tire pressures on other 3 tires and just showed generic error/alert. I wonder if this is a bug or a feature.
4. General : Directional tires like Michelin cross climates 2(CC2) need to be on all 4 (or on same axle?).
Long story : I needed the flat tire replaced. CC2 seemed like a good idea based on notes around here and other places. I plan to do CC2 on all 4 when OEMs are used up. I have about 36K on OEMs. I drove to a far away NTB in Myrtle beach area that had our size CC2 in stock (Firestone was just a quarter mile away from where we were staying). NTB advisor told me right away that I can't do CC2 on just one tire. It would sound and drive horrible. My thinking was that may be I get one CC2 now and move it to full-size spare when I get all 4 CC2s down the road. ( I suppose I should have told him more about my situation over the phone before driving over there. Oh well, that's just me and this is not the first time