On vehicles equipped with Tire Pressure Monitoring System (TPMS).
When a low tire pressure warning message has been displayed, and the tire pressure warning light has come on:
Use a tire pressure gauge to check the inflation pressure of all four tires.
Re-inflate the tire(s) to the correct pressure (consult the tire pressure placard or the pressure table of the owner's manual).
Drive the car for at least one minute at a speed of 20 mph (30 km/h) or faster.
This will erase the warning text and the warning light will go out.