The vehicle may have a tire pressure monitor that indicates a large change in the pressure in one tire.
The system stores the tire pressures of the vehicle's properly inflated tires. The LOW TIRE light will come on if the pressure in one tire becomes 12 psi (83 kPa) lower than the other three tires. The LOW TIRE light will not come on if the pressure in more than one tire is low, if the system is not yet calibrated, or if the vehicle is moving faster than 70 mph (110 km/h).
When the LOW TIRE light comes on, stop as soon as possible and check all the tires for damage. If a tire is flat, see If a Tire Goes Flat . Also check the tire pressure in all four tires as soon as possible. See Inflation - Tire Pressure .
The light will stay on, while the ignition is on, until the system is reset. See Tire Pressure Monitor System .