What does it mean when the SET light on the car dashboard is on?

[LaFinn]

The SET light on the car dashboard indicates low tire pressure. 1. The SET light is part of the tire pressure monitoring system. When it illuminates, it means the inflation pressure in one of the tires is too low. 2. Generally, a car's tire pressure monitoring system uses wheel speed sensors to detect the rotation speed of each wheel. When the speed difference between one wheel and the others reaches a certain threshold, the system will determine that the tire is underinflated, causing both the SET button light and the dashboard tire pressure warning light to illuminate to alert the driver. 3. The illumination of the SET light is most likely caused by abnormal tire pressure. Many modern vehicles are equipped with tire pressure monitoring systems. When the sensors detect abnormal tire pressure, the dashboard will alert the driver to check the tires, and in some vehicles, the "SET" button on the center console will also light up simultaneously.