1. There is something wrong with the display instrument itself: in this case, send the vehicle to the auto repair center of a professional repair shop for inspection and maintenance. Diagnose and solve any problems related to dashboard display.
2. Calculation of wheel diameter and revolution: The calculation method of mileage is related. Some cars use sensors to monitor the number of revolutions of each tire and preset parameters to calculate mileage. The system has a fault setting error. After reaching 30, the mileage display will not be updated, and it will be adjusted and maintained by professional technicians.