Originally Posted by mrpostman
I have a 2012 Focus Titanium with the 18" factory rims. 10 days ago I installed winter tires on after market 16" steel wheels. I expected the TPMS light to come on (and stay on since I don't have TPMS sensors with my winter tires) but it did not. Only yesterday, 9 days later, did the TPMS come on. Today the light did not come on. I don't understand how the system works. I thought the light would remain on all the time.
Same here. Got my new winter tires 20 days ago, and the warning light came on only a few days ago. Now, the light went off yesterday and did not come up this morning either.
Not sure if it's temperature related or whatever.