Answer
It will turn off all by itself with in a couple of miles if you had the car turned off when you filled the tires, othwise it could take a couple of days, make shure you have
over 28 psi the light triggers at this psi, if you put the spare on, it doese not have a psi sensor, and the computer will still read your flat tire, you should have a new tire put on the old rim or have the sensor switched out (but the tire must be broken down to do this). hope this helps.!