Why is the tire pressure monitor not displaying tire pressure?
2 Answers
There are mainly two reasons why a tire pressure monitor does not display the tire pressure, which are: 1. Insufficient battery power in the tire pressure sensor. Simply recharge the battery. 2. Failure to read the signal from the tire's internal monitor. Continue driving the vehicle for a while. Additional Information: Methods of tire pressure monitoring: 1. Direct tire pressure monitoring: Direct tire pressure monitoring devices use pressure sensors installed in each tire to directly measure the tire's air pressure. The pressure information is transmitted from inside the tire to a central receiver module via a wireless transmitter, and then the tire pressure data is displayed. When the tire pressure is too low or there is a leak, the system will automatically alert. 2. Indirect tire pressure monitoring: The working principle of indirect tire pressure monitoring is that when the air pressure in a tire decreases, the vehicle's weight will cause the rolling radius of that wheel to become smaller, resulting in a faster rotation speed compared to other wheels. By comparing the differences in rotation speeds between the tires, the system monitors the tire pressure. Indirect tire pressure alert systems essentially rely on calculating the rolling radius of the tires to monitor air pressure.
My tire pressure monitoring system sometimes doesn't display the pressure, and there are quite a few common reasons. For example, the battery in the sensor might be dead—these small batteries usually need replacement every few years, especially in cold weather when they drain faster. Or the sensor itself could be damaged, like from hitting a curb too hard. There could also be signal issues, such as strong magnetic interference nearby or when using a phone charger, which might block the signal and prevent the display from receiving data. Last time I noticed it wasn't working, I stopped and restarted the engine—usually the system resets itself. If that doesn't work, manually check the tire pressure with a gauge (they cost just a few bucks) to ensure safety. If it happens frequently, check if the sensors are loose or if the wiring is aging. I recommend regular maintenance where a technician can test the system—never ignore it, as abnormal tire pressure can easily lead to blowouts. In short, try replacing the battery or driving a few kilometers to wake up the system. If it still doesn't work, take it to a professional repair shop for diagnosis.
