Reasons for BYD Yuan Tire Pressure Warning Light Illumination?
2 Answers
Reasons for BYD Yuan tire pressure warning light illumination may include abnormal tire pressure (too high or too low), failure to reset the tire pressure monitoring system, or damage to the tire pressure sensor. Abnormal Tire Pressure: The system typically triggers an alert when pressure falls below 1.8 bar or exceeds 3.0 bar. In such cases, tire inspection and pressure adjustment are required. Failure to Reset Tire Pressure Monitoring: If the system isn't reset after tire inflation, it continues to display previously recorded data, causing the warning light to illuminate. Simply performing a tire pressure reset will resolve this issue. Damaged Tire Pressure Sensor: The tire pressure sensor, installed inside the tire and connected to the inflation valve, monitors tire pressure. If damaged during driving (e.g., by impact), it will trigger the warning light. Sensor damage necessitates replacement with new components.
I just drove my BYD Yuan on a long trip when the tire pressure warning light suddenly came on. The main reason is low tire pressure, mostly caused by slow leaks or sudden temperature drops leading to pressure loss. The sensors could also be faulty—the BYD Yuan uses a direct TPMS system with built-in sensors in each tire. Over time, the batteries may fail or signal interference could trigger false alarms. Another possibility is system misjudgment, such as failing to reset the system after installing new tires. I recommend first checking the pressure with a gauge—the standard is posted on the driver’s door, around 230 kPa for the front tires. Inflate if needed. If the light stays on, visit a 4S shop to diagnose the sensor module—never ignore it, as the risk of a blowout increases significantly on highways. For regular maintenance, check tire pressure monthly and monitor more frequently in winter.
