I bought a full size spare for my 14 Foz.
Ran it for a 25 mile hwy test run to make sure all is OK in case I actually need it one day.
Took about 5 minutes and 5 miles for my TPMS to light up or for the system to notice that I replaced my tire with a spare that has no sensor.
During the return trip, after putting the OEM tire/ rim with the system back on, I was stuck at a traffic light before entering the hwy and the light went off with almost no driving.
It seems to me that the system scans every few minutes and that driving miles are unrelated.
The point, once the tire/ rim with the sensor are replaced with the correct air pressure, the TPMS light should go off without having to see a dealer.