What Causes the Yellow Tire Pressure Warning Light to Illuminate?
2 Answers
Car tire pressure yellow light is on due to abnormal tire pressure, which generally has the following 3 reasons: Abnormal tire pressure: The system usually triggers an alarm when pressure is below 1.8bar or exceeds 3.0bar. In this case, tire inspection and pressure adjustment are required. Tire pressure monitoring system not reset: After inflating the tires, if the tire pressure reset isn't performed promptly, the monitoring system continues to display previously recorded data, causing the warning light to illuminate. Simply performing a tire pressure reset will resolve this. Damaged tire pressure sensor: The tire pressure sensor, installed inside the tire and connected to the inflation valve, monitors tire pressure. If the sensor is damaged during driving (e.g., by impact), it can trigger the tire pressure warning light. For sensor damage issues, replacement with a new component is the only solution.
I've been driving for ten years, and the tire pressure warning light is all too common. Eighty percent of the time it's due to a tire leak, especially in winter when temperatures drop and tire pressure follows suit, triggering the system alarm. Last month, my right rear tire fell victim—upon closer inspection, I found a nail stuck in it. If all four tires are fine, it might be a sensor issue or a false alarm, which is more likely to happen on bumpy roads. Also, the light can come on if the mechanic forgets to reset the tire pressure system after maintenance. I recommend glancing at your tires before each drive and checking the pressure promptly if the light comes on. Abnormal tire pressure is especially dangerous on highways, so keep an emergency air pump handy. If the light stays on after inflating, head straight to a repair shop to check the wiring and sensors.
