What is the reason for the vehicle's set light to illuminate?
3 Answers
The reason for the vehicle's 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 the light is on, it indicates that at least one of the vehicle's four tires has a pressure value lower than the standard, indicating an underinflated state. Tire pressure refers to the air pressure inside the tire. The 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, leading to abnormal heating due to excessive rolling; 4. The friction between the tire and the ground increases exponentially, leading to a tire blowout.
I've been driving for over a decade and am quite familiar with the SET light coming on. This light is usually the tire pressure monitoring system warning light, indicating that the tire pressure might be too low, typically triggered when it falls below the standard value. Last week when my car's SET light came on, I drove to the repair shop and found out it was a slow leak in the left rear tire caused by a small stone puncture. They patched the tire, inflated it to the correct pressure, and after holding the SET button on the dashboard for a few seconds, the light went off. Sometimes the light may come on even when the pressure is fine, which could mean a faulty sensor or dead battery in the sensor, requiring sensor replacement. Ignoring this is unsafe as it increases the risk of a blowout and wastes fuel, so it's best to develop a habit of manually checking tire pressure every month.
As the primary driver in my household, seeing the SET light come on always makes me nervous because I know there's an issue with tire pressure. Low tire pressure is detrimental to driving safety, potentially causing skidding during turns, especially at high speeds, which is particularly dangerous. Every time I notice the light on, I immediately find the nearest gas station to use the air pump to check each tire's pressure and inflate them to the recommended levels. Then, I refer to the manual to press and hold the SET button to reset the system. If the light stubbornly remains on, it's likely a sensor malfunction, and I need to schedule an inspection at the dealership. To prevent such issues, I recommend developing a habit of checking and maintaining your tires every two months—it's both safer and more cost-effective.
