2020 Ford Mustang Speedometer Isn't Working

Common Causes of Speedometer Malfunctions in Your 2020 Ford Mustang and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
35% chance it's the
Vehicle Speed Sensor (VSS)
0%
28% chance it's the
Speedometer
0%
23% chance it's the
Electrical Issue
0%
14% chance it's
Something else
The most common reasons a 2020 Ford Mustang speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
  • Vehicle Speed Sensor (VSS): A faulty vehicle speed sensor can result in inaccurate speed readings and erratic transmission shifting.
  • Speedometer: A faulty speed sensor or a broken connection in the speedometer circuit can result in inaccurate speed readings.
  • Electrical Issue: A blown fuse or a short circuit in the wiring can cause various electrical issues in the vehicle's systems.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the steps to diagnose a non-functioning speedometer in a 2020 Ford Mustang?

To effectively diagnose a non-functioning speedometer in a 2020 Ford Mustang, start with a systematic approach that prioritizes simpler solutions before delving into more complex diagnostics. Begin by checking the fuse associated with the speedometer in the fuse box, as a blown fuse is a common and easily fixable issue. If the fuse is intact, proceed to inspect the speed sensor located on the transmission; ensure it is not damaged or disconnected, as this component is crucial for relaying speed data. Next, examine the wiring connections for any signs of looseness, damage, or corrosion, as faulty wiring can disrupt the speedometer's functionality. If these preliminary checks do not reveal the problem, utilize a diagnostic tool to test the speedometer cluster for internal faults, which may indicate a more serious issue within the cluster itself. Additionally, assess the Vehicle Speed Sensor (VSS) to confirm it is operating correctly, as it plays a vital role in providing accurate speed readings. If all else fails and the speedometer remains non-functional, it may be time to consult a professional mechanic who specializes in Ford Mustangs for further diagnostics and repairs. By following this structured approach, you can efficiently identify and address the issue with your speedometer.

What are the common problems that could cause the speedometer to stop working in a 2020 Ford Mustang?

When dealing with a non-functioning speedometer in a 2020 Ford Mustang, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty vehicle speed sensor, which can lead to inaccurate readings or a complete failure of the speedometer. Additionally, a broken speedometer cable can disrupt the connection necessary for accurate speed display. Another potential issue is a blown fuse in the instrument panel, which can cut off power to the speedometer. Furthermore, problems within the instrument cluster itself, such as faulty connections or internal damage, can also result in speedometer malfunction. Lastly, faulty wiring that connects the speedometer to the vehicle's systems can lead to disruptions in functionality. If you find yourself facing this issue, it's advisable to conduct a thorough inspection or consult a qualified mechanic to accurately diagnose and resolve the problem.

How urgent is it to address the non-functioning speedometer in a 2020 Ford Mustang?

Addressing a non-functioning speedometer in a 2020 Ford Mustang is an urgent matter that should not be overlooked. The speedometer plays a critical role in ensuring safe driving by allowing the driver to monitor their speed accurately. Without this essential tool, drivers risk exceeding speed limits unknowingly, which can lead to legal repercussions such as fines or even license suspension. Moreover, a malfunctioning speedometer can compromise safety, as it hinders the ability to adjust speed according to road conditions, increasing the likelihood of accidents. Additionally, the speedometer is linked to various vehicle systems; thus, its failure may indicate deeper mechanical issues that could affect overall vehicle performance. Lastly, neglecting this problem can diminish the resale value of the Mustang, as potential buyers are often wary of vehicles with unresolved mechanical issues. Therefore, it is crucial to address a non-functioning speedometer promptly to ensure compliance with the law, maintain safety, preserve vehicle performance, and protect the car's resale value.

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