What is the reason for the car SET light to illuminate?
2 Answers
The reason for the car SET light to illuminate is abnormal tire pressure, which requires storing the tire pressure. The SET light is a tire pressure monitoring indicator light. Once it lights up, it indicates that at least one of the vehicle's four tires has a pressure value lower than the standard, meaning it is in a state of underinflation. Tire pressure refers to the air pressure inside the tire. Hazards of abnormal tire pressure: 1. The friction coefficient with the road surface increases, leading to higher fuel consumption; 2. It causes unsafe factors such as a heavy steering wheel and easy deviation; 3. It increases the movement of various parts of the tire, causing abnormal heating due to excessive rolling; 4. The friction between the tire and the ground multiplies, leading to tire blowouts.
When the SET light on the car is illuminated, it usually indicates that the cruise control system is activated. For example, if you press the SET button on the steering wheel, the system will automatically lock the setting and maintain a constant speed once the vehicle reaches a certain speed, helping you save fuel and effort. However, sometimes the light may come on unexpectedly due to system misactivation, a stuck button, or signal errors caused by dirty sensors, such as inaccurate wheel speed sensor data leading the system to assume the speed has been set. Regular cleaning of the sensors can prevent such false alarms. If the light continues to flash or there are other unusual sounds, consider system failures such as a damaged control module, short circuits, or blown fuses affecting the circuit's operation. During long drives, I often notice the light on and relax my feet but always pay attention to braking conditions to ensure safe stopping. It’s advisable to check the vehicle manual to confirm the indicator light status and perform timely repairs to avoid potential hazards.
