What causes the tire pressure light to come on?

[SanAmara]

The illumination of the tire pressure warning icon indicates abnormal tire pressure. This could be due to low tire pressure caused by tire damage, lack of long-term maintenance, or temperature drop, or it could be due to high tire pressure caused by over-inflation or temperature rise. Tire Pressure: In the strict sense, it refers to the air pressure inside the tire. Nowadays, many tires are not filled with air. For these tires, the tire pressure requirements are more stringent. The relationship between tire pressure and load capacity: Tire pressure is an indicator of a vehicle's load capacity. The size of the vehicle's load depends on the level of tire pressure. According to the relationship between the tire's load index, tire pressure, and load capacity, the higher the tire pressure, the greater the load capacity; the lower the pressure, the smaller the load capacity.