The temp dropped today to 28 degrees. My TPS light went on today on my 2012 Lexus ES350. The door post says 30 PSI. If you put the 30 PSI in the tires and try to reset set the TPS light it will not reset. After trial and error I added 34PSI to my tires. That is what it took for the reset to work!!!
To reset the TPS light on the dash, hit the start button 2 times. Look under the dash to the right of the steering wheel. Their are two buttons the one closes to the steering wheel push in and hold until the light go's out on the dash. For some reason the Lexus computer dos not like the factory setting on the door post of the car? I hope this helps you solve the TPS dash light issue.