Tire pressure warning light

Amber horseshoe shape with an exclamation point A steady light means at least one tire is about 25 percent or more below its recommended pressure. Look at the tires first. If one is visibly low or flat, pull over and put on the spare or call for help, because an underinflated tire grips and handles worse and can blow out. If they all look fine, check each one with a gauge and fill them to the pressure on the sticker inside the driver's door within a day. Cold snaps set it off often: pressure drops about 1 PSI for every 10°F fall in temperature. A light that flashes for a minute or so at startup and then stays on means the monitoring system itself has a fault, so it may not warn you about a real leak.