Why are all four tire pressures not displaying?

[StAlivia]

If all 4 tire pressures are not displaying, there may be an issue with the tire sensors, and they should be replaced promptly. Normally, it is unlikely for all four tires to have abnormal tire pressure simultaneously, which suggests a potential problem with the tire pressure system or the tire pressure sensors. Hazards of overinflated or underinflated tires: For tires, the pressure should neither be too high nor too low. Overinflated tires reduce the contact area with the ground, leading to poor traction, which can affect the vehicle's handling and driving stability. Underinflated tires may experience wave-like deformation during high-speed driving, compromising tire lifespan and increasing the risk of a blowout. Standard tire pressure specifications: According to the international GBT2978-2008 standard requirements, the recommended tire pressures are as follows: Standard tires: 2.4-2.5 bar; Reinforced tires: 2.8-2.9 bar; Maximum pressure: should not exceed 3.5 bar.