The problem occurred on a road trip for my wife. She was driving up to New York and the Van started dinging and saying that she had a flat tire. the dash showed that the rear left tire was flat and that the others were fine. she could tell that the wheel was not flat while driving it so she instead called me. I told her that I had just checked the tires the day before and they were fine pressure wise and suggested that she just pick up a tire gauge at the next stop and check them. the tires pressures were fine. Light was off after this stop and did not come on again until she was almost home several day later from that trip. Gave tire warning and then each tire showed zero pressure after about a minute of the first tire doing this. she ignored it this time. came home and tires were fine. has not done this again since then.