Originally Posted by chrisww2
My low tire pressure light came on this AM as well, did you ever get an answer for it?
Did it eventually go off? Sometimes the TPMS senses a low tire if the weather is cold. The air in the tire contracts and will make the sensor read the tire as deflated. Once you start driving the air in the tire warms up and reads normal. It takes several revolutions of the wheel to get it to go off even if the problem is corrected. It uses a RFID to send signals after each revolution. It's notices if the the tire pressure is actually low... or if the pressure changes too rapidly. You can also get weird readings if you leave a warm garage and go out into the cold. Just a heads up on a few of the quirks of a TPMS.