What Causes Abnormal Tire Pressure Signal in BYD Song?

[LaneDella]

BYD Song tire pressure abnormalities generally have the following 3 causes: Tire pressure abnormality: The system typically alerts when pressure falls below 1.8bar or exceeds 3.0bar. In this case, tire inspection and pressure adjustment are required. Tire pressure monitoring system not reset: After tire inflation, if the system isn't promptly reset, it continues using previously recorded data, causing the tire pressure warning light to illuminate. Simply performing a system reset will resolve this. Damaged tire pressure sensor: These sensors, installed inside tires and connected to inflation valves, monitor tire pressure. If damaged during driving (e.g., by impact), they trigger the warning light. Damaged sensors require complete replacement. There are 3 common tire pressure monitoring methods: Direct TPMS: Uses pressure sensors in each tire to directly measure pressure, transmitting data wirelessly to a central receiver that displays individual tire pressures. Indirect TPMS: Detects pressure loss by comparing wheel speeds - underinflated tires have smaller rolling radii and rotate faster. Tire Pressure Monitoring System (TPMS) overview: This hybrid system combines advantages of both methods, installing direct sensors on two diagonal tires while using 4-wheel indirect monitoring. More cost-effective than full direct systems, it overcomes indirect systems' inability to detect simultaneous underinflation in multiple tires.

[AnastasiaMarie]

My car is a BYD Song, and I also encountered a tire pressure signal warning a while ago, which I found quite annoying. Possible causes include the sensor battery running out of power—these wireless sensors typically last five to six years, and insufficient power can prevent signal transmission. Another reason could be that the tires were recently repaired or the rims were replaced, causing the sensor position to be misaligned. Interference from other electronic devices in the car is also common, such as phone chargers or high-power audio systems blocking the signal. It's best to first use a manual tire pressure gauge to check the pressure in all four tires. If the readings are normal, it means the system is giving a false alarm, and you can try resetting the tire pressure monitoring function in the car settings. If that doesn’t work, head to a professional shop to diagnose it with a scanner—don’t delay safety. Unstable tire pressure accelerates tire wear and increases the risk of a blowout. From my personal experience, I’ve learned how important it is to address this promptly.

[DiMalachi]

My BYD Song suddenly showed a tire pressure warning last time, which really scared me. In short, common issues could be a faulty sensor, like a dead battery or damage from road debris; or a minor software glitch in the system, such as a failed startup self-check. I looked it up online, and many people complain about signal interference from subways or high-voltage power lines. I suggest you pull over immediately to manually check the tire pressure, and if it's safe, drive slowly to a repair shop—don't take any chances. During routine maintenance, remember to inspect the sensor seals and battery status to prevent issues. Inaccurate tire pressure not only affects handling but also increases fuel consumption by several liters. My experience was a costly lesson for peace of mind.

[LydiaLynn]

When my BYD Song shows abnormal tire pressure signals, I need to be alert. It may be due to interrupted sensor communication or signal loss after tire damage; for example, the battery life may have expired, or the system may misjudge pressure changes. First, ensure manual tire pressure measurement is normal to avoid accidents during high-speed driving. Related issues include signal interference or loose sensors, and regular maintenance is recommended; if not repaired, it may cause uneven tire wear and affect driving safety.

[StGenesis]

I often tinker with in-car systems and found that most tire pressure signal issues are caused by sensor failure or interference. For example, the TPMS sensor battery in BYD Song models typically lasts five to seven years before needing replacement. Additionally, tire changes or bumpy roads can cause signal instability. It's recommended to verify with a tire pressure gauge and reset the system. If that doesn't work, use professional tools to scan for fault codes and perform repairs. Keep interference sources like electromagnetic devices away, and maintain sensor cleanliness to extend their lifespan. Abnormal tire pressure increases rolling resistance and raises fuel consumption.

[VanKarter]

My experience: Don't rush to repair when the tire pressure signal is abnormal, first manually check if the pressure is normal. Common issues with the BYD Song include depleted sensor batteries, external interference, or system calibration errors; sometimes the signal fails after tire repairs. A simple reset of the car's tire pressure settings might solve the problem, otherwise, visit a 4S shop to check the sensor. Always avoid severe tire vibrations, as inaccurate tire pressure accelerates wear. Timely action is essential for safe driving.