Why does the tire pressure monitoring light come on when there is no air leakage?

[SanCharlotte]

The tire pressure monitoring light may come on even without air leakage for the following reasons: 1. Puncture-induced tire pressure monitoring light activation: This usually involves very slow air leakage, making it difficult to immediately identify which tire is affected. In this case, use a tire pressure gauge to measure the pressure (front tires: 2.3 bar, rear tires: 2.5 bar). If the pressure is low, inflate the tire accordingly. 2. The tire pressure monitoring light may also come on due to overinflation: Standard tires should be inflated to 2.4-2.5 bar; reinforced tires to 2.8-2.9 bar. The maximum pressure should not exceed 3.5 bar. Thus, if any tire exceeds 3.0 bar, it can trigger the tire pressure monitoring light. 3. Prolonged driving with low tire pressure: If a tire's pressure is too low, high-speed driving can increase the tire temperature, leading to a rise in pressure. In such cases, stop and rest or replace the tire with a spare. 4. Long-term underinflation: When the pressure drops below 1.8 bar, the tire pressure monitoring light may activate. Regularly check whether the tire pressure monitor is functioning properly.