What is the reason for the speedometer not displaying in the new Sylphy?

[LincolnRose]

New Sylphy speedometer not displaying is likely due to a damaged sensor. The function of the car sensor: The speedometer uses the measurement signal from the speed sensor to calculate and display the vehicle's speed. There are two methods to calculate the speed: one is to count the number of pulses output by the sensor within a fixed time, and the other is to measure the time taken for a fixed pulse period. The pulse counting method works by the microprocessor detecting an increase in the number of pulses from the sensor signal, then starts counting the pulses representing the speed. After detecting the number of pulses over a preset time, the data in the counter is compared with the data in memory. If the difference reaches one kilometer per hour or more, the data in the counter is output to the display circuit to refresh the display value, and this entire process is continuously repeated. Reasons for car sensor failure:

[DiRylee]

I've been driving the new Sylphy for a while, and last week I encountered a situation where the speedometer wasn't displaying, which was quite annoying. There could be several possible reasons: the most common is a faulty speed sensor, which may be dirty or broken, causing no signal transmission; a blown fuse can be checked in the fuse box; issues with the dashboard screen, such as aging circuits or loose connections, sometimes occur on bumpy roads; short circuits or open circuits in the wiring should not be ignored, especially when humidity is high and corrosion is likely; software faults in the control module are more common in digital models, so try restarting or updating. Not having a speed display is particularly dangerous, as it can lead to speeding tickets or accidents. So, when I noticed it, I immediately pulled over, used a backup gauge or mobile navigation as a substitute, and then went to the 4S shop for inspection. The professionals used a diagnostic tool to identify the issue and fixed it. Regular maintenance checks on these components can prevent such problems—don't skimp and ignore them.

[WestonDella]

As a car enthusiast who has dealt with numerous car repairs, a disappearing speedometer is no small issue. The causes can generally be categorized into several types: sensor problems are the most common, as sensors located near the tires are prone to dust accumulation or water damage; a blown fuse is an easy fix—just replace it by locating the corresponding position in the manual; wiring inspection requires a multimeter to check for corrosion in plugs and harnesses; dashboard malfunctions or software bugs require an OBD tool to read fault codes; a faulty control unit like the ECM is a major issue. I once encountered a broken sensor where driving felt normal but the speed was inaccurate. A manual inspection revealed a broken wire, which I reconnected to solve the problem. However, if you lack experience, it's best not to tamper with it—consulting a mechanic is the safer option. Safety first: after stopping, turn on the hazard lights before handling the issue.

[DiGianna]

I just started driving a new Sylphy not long ago, and suddenly losing speed was really scary. It's mostly due to a faulty or blocked sensor, with dirt obstructing the signal; dashboard issues are common, like a black screen or malfunction—try restarting it; software glitches happen in digital models, updating the system can fix it; blown fuses are easy to check and replace; wiring problems like loose connectors are more noticeable when bumpy. Driving without a speed display on the highway feels unsafe, fearing speeding accidents—I immediately slowed down, pulled over, checked speed via a phone app, then went to the shop for repairs. Usually, parking in a garage avoids moisture damage to parts, and using navigation aids helps prevent issues.