What does a half circle with an exclamation mark indicate as a fault?

[VanMadeline]

A half circle with an exclamation mark indicates a tire pressure fault in the vehicle. Here are the specific details: 1. Introduction: Tire pressure, strictly speaking, refers to the air pressure inside the tire. In terms of car maintenance, the engine is the heart of the car, and its damage will lead to the end of the car's life. Similarly, tire pressure is the blood pressure of the car, and the level of tire pressure plays a crucial role in the performance and power of the car. 2. Function: When a car is driving at a constant speed on a level road, it must overcome the rolling resistance from the ground and the air resistance. The tire pressure has a significant impact on the rolling resistance coefficient. When the pressure decreases, the rolling resistance coefficient increases rapidly. This is because when the tire pressure decreases, the deformation of the rolling tire increases, leading to increased hysteresis loss. Therefore, appropriate tire pressure is essential for ensuring good dynamic performance of the car.