* Low tire pressure: One or more tires are below the recommended pressure.
* TPMS sensor malfunction: A sensor in one or more wheels might be faulty, dead battery, or not communicating properly with the vehicle's computer.
* Tire pressure is dropping slowly: While not critically low yet, the system detects a slow leak which could lead to problems.
You should immediately check the pressure in all your tires using a reliable tire pressure gauge. If any are low, inflate them to the correct pressure (found on a sticker usually located on the driver's side doorjamb or in your owner's manual). If the warning light stays on *after* inflating to the correct pressure, there is likely a problem with one of the TPMS sensors. You will need to have this checked by a mechanic or tire shop.