Why is the BYD tire pressure warning light on?

[McEverett]

There are generally three reasons why the BYD tire pressure warning light is on: Abnormal tire pressure: It usually triggers an alarm when the pressure is below 1.8 bar or above 3.0 bar. In this case, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure monitoring system is not reset in time, it will continue to display the previous data, causing the tire pressure warning light to illuminate. Simply resetting the tire pressure monitoring system will resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which monitors tire pressure, is installed inside the tire and connected to the tire inflation valve. If the sensor is damaged due to impact while driving, the tire pressure warning light will also turn on. For sensor damage, the only solution is to replace it with a new one. There are three common types of tire pressure monitoring systems: Direct tire pressure monitoring: This system uses pressure sensors installed in each tire to directly measure tire pressure. The pressure data is transmitted wirelessly from inside the tire to a central receiver module, which then displays the pressure readings for each tire. Indirect tire pressure monitoring: When the pressure in a tire decreases, the vehicle's weight causes the rolling radius of that tire to reduce, making it rotate faster than the other wheels. By comparing the rotational speed differences between tires, this system monitors tire pressure. Introduction to the Tire Pressure Monitoring System (TPMS): This system combines the advantages of both direct and indirect systems. It equips direct sensors in two diagonally opposite tires and includes a four-wheel indirect system. Compared to a full direct system, this hybrid approach reduces costs and overcomes the limitation of indirect systems, which cannot detect simultaneous low pressure in multiple tires.