What causes the failure of Skoda's indirect tire pressure monitoring system?
4 Answers
Skoda's indirect tire pressure monitoring system failure is caused by damaged wheel speed sensors or poor wiring connections. Methods to resolve the tire pressure warning light: If the tire pressure warning light is on due to a punctured tire, this situation usually involves very slow air leakage, making it difficult to immediately identify which tire is affected. You can use a tire pressure gauge to measure the pressure. If a tire is underinflated, inflate it to the proper level and then observe whether the tire pressure warning light turns off. If it turns off immediately but comes back on after a few days, the tire should be removed for further inspection. How indirect tire pressure monitoring works: When the air pressure in a tire decreases, the vehicle's weight causes the rolling radius of that wheel to become smaller, resulting in a faster rotation speed compared to the other wheels. By comparing the differences in rotation speeds between the tires, the system monitors tire pressure. Essentially, the indirect tire pressure warning system relies on calculating the rolling radius of the tires to monitor air pressure.
Last time I went to the repair shop, many car enthusiasts mentioned this issue. They said it's quite common for ŠKODA's indirect tire pressure monitoring system to malfunction, mostly because the wheel speed sensor gets clogged with mud or breaks. That little thing is particularly prone to getting dirty with mud and water at the rear wheel position. If you've just changed or repaired a tire, chances are you forgot to reset the system, and the tire pressure light on the dashboard will give false alarms. From my own experience, uneven tire pressure during summer highway driving can also trigger false alarms. It's best to regularly check if all four tires are inflated to the manufacturer's recommended pressure. Also, for older cars, pay attention to wiring aging issues. The mechanic said poor contact in the control module can also cause the entire system to act up.
Hey, this question is actually quite interesting. I've studied how it works. The system actually compares the speed difference between the four wheels through ABS sensors, so the first suspect is always the wheel speed sensor. Last time, my cousin's car had the TPMS light staying on because the sensor connector was loose. If you've just changed to a spare tire of a different size or mixed old and new tires, the system gets totally confused. Here's a cool fact: when making sharp turns on icy roads, the excessive speed difference between inner and outer wheels can also falsely trigger the alarm. I recommend having the mechanic check the fault codes with a diagnostic computer during each maintenance - sometimes it's as simple as needing a software update.
Once when I was driving my kid to school, the tire pressure warning light suddenly came on, which really freaked me out. The mechanic later told me that indirect monitoring systems are just that sensitive—changing to snow tires without resetting can trigger false alarms, and even a 0.2 bar pressure difference might set it off. If you've just patched a tire or the wheel alignment is off, causing the wheels to rotate at different speeds when turning, the system might think there's a flat tire. The ramp in our underground parking garage is particularly steep, and every time I drive up it, the tire pressure light flashes. The technician said this is normal. Now, every time I adjust the tire pressure, I make sure to press the 'SET' button on the central control screen to reset the system.
