What causes abnormal tire pressure signal in BYD Song?
2 Answers
The reasons for abnormal tire pressure signal in BYD Song are abnormal tire pressure, unreset tire pressure monitoring, or damaged tire pressure sensor. The tire pressure monitoring indicator is a yellow symbol, an irregular circle with no seal on top, four small spikes at the bottom, and an exclamation mark inside. The illumination of the tire pressure monitoring indicator indicates abnormal tire pressure. Abnormal tire pressure: Generally, an alarm will be triggered if the pressure is below 1.8bar or above 3.0bar. At this time, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure is not reset in time, the tire pressure monitoring system will still record the previous data, causing the tire pressure monitoring indicator to light up. In this case, simply reset the tire pressure. Damaged tire pressure sensor: The tire pressure sensor is used to monitor tire pressure and is directly installed inside the tire, connected to the tire inflation port. If the tire pressure sensor is damaged due to impact while driving, it will also cause the tire pressure fault light to illuminate. For sensor damage issues, only a new replacement part can be used.
I've repaired many vehicles, especially models like the BYD Song equipped with tire pressure monitoring systems. Signal abnormalities usually stem from a few root causes. The most common is actual tire pressure changes, such as prolonged lack of inflation or sudden temperature drops causing leaks, triggering false alarms. The sensors themselves can also malfunction - depleted batteries or impact damage are frequent issues. BYD's sensor modules are quite delicate and prone to signal interference from rainwater corrosion. Another cause is the system software requiring reset, particularly after tire replacements or accessory installations, where electromagnetic interference may cause signal fluctuations. For routine troubleshooting, I recommend first checking with a tire pressure gauge to ensure uniform pressure across all wheels meets standard values; if normal, manually reset the system; if the issue persists, scan for error codes to locate sensor or wiring faults. Don't underestimate this - signal abnormalities can mislead you, significantly increasing risks when driving at high speeds with inaccurate tire pressure readings.
