What does it mean if my Nissan tire pressure light comes on?

Your vehicle is equipped with a Tire Pressure Monitoring System (TPMS) that monitors the tire
pressure of all tires except the spare. If the vehicle is being driven with low tire pressure, the warning light will illuminate. A CHECK TIRE PRESSURE warning message may also be displayed in the odometer. When the low tire pressure warning light illuminates, you should stop and adjust the tire pressure of all 4 tires to the recommended COLD tire pressure shown on the Tire and Loading Information label located in the driver’s door opening. The low tire pressure warning light does not automatically turn off when the tire pressure is adjusted. After the tire is inflated to the recommended pressure, the vehicle must be driven at speeds above 16 MPH (25 km/h) to activate the TPMS and turn off the low tire pressure warning light. Use a tire pressure gauge to check the tire pressure. The low tire pressure warning light remains illuminated until the tires are inflated to the recommended COLD tire pressure. The CHECK TIRE PRESSURE warning message is displayed each time the ignition switch is placed in the ON position as long as the low tire pressure warning light remains illuminated.
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