I own a 2009 Rx 350. Last Tuesday, at midnight, 1 hour from home, my TPMS light came on. Flashing first then steady. I didn't get out the manual till morning and saw that if that happens, it's a system malfunction. My Toyota dealership, where all my maintenance is done except for warranty work, as the closest Lexus dealership is 1 hour away, was able to shut the light off after checking all the pressures etc. The light remained off till 185 miles later on my way to Boston to watch the Celtics win game 7. This time I was not nervous about it. Anyone have the same thing happen? All my tire pressures are ok.