What to Do If the LCD Dashboard Odometer Shows Excessive Speed?
2 Answers
According to national regulations, the vehicle speed displayed on the dashboard can have an error range of -10% to 10%. Secondly, the speed displayed on the dashboard is achieved through mechanical principles. It calculates the distance traveled by measuring how many meters the tire covers in one rotation and then counting the number of rotations. However, vehicle tires become thinner after long-term use, and there may be differences between new tires and the original ones. Perform a full vehicle maintenance at a 4S shop, as there might be an issue with the chip inside.
I also encountered an issue with the speedometer on the LCD display showing a faster speed than the actual speed when I drove a new car before. It might be due to the wheel speed sensor being covered with mud or poor wiring contact. I thought about doing a DIY check, so I removed the tire and simply cleaned the sensor and wiring connections, which somewhat alleviated the problem. However, I don’t recommend inexperienced people to try this as it carries risks. An inaccurate speedometer can mislead fuel consumption, lead to speeding tickets, or even affect the car’s resale value. By the way, modifying tire sizes without recalibrating the speedometer can also cause similar issues. Regular maintenance is recommended to prevent faults, and if you're unsure, it’s best to visit a professional shop for inspection—safety first.
