What are the reasons for abnormal tire pressure signal in BYD Song MAX?
4 Answers
Tire pressure abnormalities generally have the following 3 reasons: Abnormal tire pressure: Generally, an alarm will be triggered if the pressure is below 1.8bar or exceeds 3.0bar. In this case, 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 original data, causing the tire pressure monitoring indicator light to turn on. Simply performing a tire pressure reset will resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which is installed inside the tire and connected to the tire inflation valve, monitors the tire pressure. If the sensor is damaged due to impact while driving, it can also cause the tire pressure warning light to illuminate. In case of sensor damage, the only solution is to replace it with a new one. Hazards of excessive tire pressure: Reduced tire friction and adhesion, affecting braking performance; Causes steering wheel vibration and deviation, reducing driving comfort; Accelerates wear on the central tread pattern, shortening tire lifespan; Increases vehicle vibration, indirectly affecting the lifespan of other components; Overextends the tire cords, reducing tire elasticity and increasing the load on the vehicle during driving; Decreases puncture resistance. When encountering sharp objects like nails or glass on the road, the tire is more prone to punctures, leading to internal cracks or blowouts, resulting in a tire burst.
When it comes to abnormal tire pressure signals in the BYD Song Max, the most common issue I've encountered is a dead sensor battery. The tire pressure monitoring system relies on these small sensors, and after a few years, the batteries tend to drain, causing signal loss or inaccuracies. Another frequent issue is failing to reset the system after tire changes—for example, after getting a wheel balance or new tires at a shop, you need to manually re-pair the sensors; otherwise, the car won’t receive the correct signals. Environmental interference can also be a factor, such as driving near high-voltage towers or strong electromagnetic sources, which can disrupt the tire pressure signals and trigger false alerts. Safety first—if this happens, don’t panic. First, pull over and check if the tire pressure is normal. If it is, the issue might be with the system itself, and it’s best to visit a 4S shop for a professional scan of the error codes. Replacing a sensor battery isn’t difficult, but DIY repairs gone wrong can make things worse. Regular maintenance should include checking the tire pressure system to ensure driving safety.
As an experienced driver who has driven many cars, I've encountered the issue of abnormal tire pressure signals in the Song Max multiple times. The most common cause is sensor failure itself, such as water ingress causing short circuits or collision damage, especially after rainy days or driving on rough roads. If the sensor inside the tire is improperly positioned or not securely fixed, the signal transmission becomes unstable. Another factor is external interference; if you've installed high-power electronic devices in the car, like phone chargers or external audio systems, electromagnetic interference can cause erratic tire pressure signals. System software bugs can also lead to issues, which can be resolved by OBD upgrades at the 4S shop. Always pay attention to changes in tire pressure. If abnormalities occur, don't panic—manually check if the tire pressure in all tires is consistent. If it's below the standard value, add air. If the problem persists, visit a repair shop for inspection and maintenance. Developing a habit of regular checks can prevent many troubles.
As someone who enjoys tinkering with automotive technology, I've found that abnormal tire pressure signals in the Song Max often stem from hardware or software issues. The most common cause is low battery voltage in the sensors - these batteries typically last 3-5 years before depletion affects signal transmission. Wireless communication failures shouldn't be overlooked either, as frequency conflicts or antenna problems can prevent the controller from receiving accurate data. Additionally, uninitialized system settings may trigger alerts, like failing to reset the TPMS after switching to winter tires. Solutions include DIY manual reset (hold the set button while parked to reboot the system) or using an OBD scanner to read trouble codes for more complex cases. Preventive measures matter too: avoid parking near strong magnetic fields, keep vehicle software updated, and maintain proper tire pressure to reduce false alarms.
