Why does the Audi tire pressure warning light come on when there's no air shortage?
2 Answers
Audi tire pressure warning light comes on but no air shortage reasons: Tire pressure monitoring not reset: After inflating the tires, if the tire pressure reset is not performed in time, the tire pressure monitoring system will still record the original data, causing the tire pressure monitoring indicator light to illuminate. In this case, simply perform a tire pressure reset. Tire pressure sensor damage: 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 by impact while driving, it can also cause the tire pressure warning light to come on. For sensor damage issues, only replacement with a new component is possible. Tire pressure monitoring reset method: First, turn on the ignition switch, press and hold the tire pressure monitoring reset button until you hear a "beep" sound, then release. The tire pressure monitoring system will store the current normal tire pressure data, automatically clear the original data, and finally the dashboard warning light will turn off, completing the tire pressure reset.
As a friend who drives an Audi, I find false alarms from the tire pressure monitoring system all too common. The sensors are as sensitive as detectives, throwing a tantrum with just a few degrees of temperature change. Last week, after my car sat in the garage and then was parked outside in the sun for two hours, the dashboard immediately lit up with a yellow warning light. The principle is actually quite simple: small sensors in the wheels send signals via radio waves. If the signal is interfered with by metal objects or the battery is low, the system thinks the tire is flat. Another pitfall is when the mechanic doesn’t reset the system after fixing a flat—the computer still remembers the old data! My advice is to check the tire pressure with a mechanical gauge when the car is cold, then hold down the CAR button on the center console to access the menu and reset it. Driving a couple of kilometers usually clears the alarm. However, if false alarms persist, it’s worth checking the wheel speed sensor—my neighbor had to replace a module because of this.
