2018 Lincoln MKX Speedometer Isn't Working

Troubleshooting Common Issues with the Speedometer in Your 2018 Lincoln MKX and How to Fix Them

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Reviewed by
Aisha
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 2018 Lincoln MKX 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 steps should I take to diagnose the non-functioning speedometer in my 2018 Lincoln MKX?

To effectively diagnose the non-functioning speedometer in your 2018 Lincoln MKX, begin with the simplest solutions before progressing to more complex diagnostics. Start by checking the fuse associated with the speedometer in the fuse box, as a blown fuse can easily disrupt its operation. If the fuse is intact, inspect the speed sensor, which is crucial for relaying speed data to the speedometer; any visible damage or malfunction here could be the culprit. Next, examine the wiring connected to both the speedometer and speed sensor for loose connections or signs of wear, as faulty wiring can lead to malfunctions. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into specific issues affecting the speedometer system. If these steps do not resolve the problem, testing the speedometer cluster itself may be necessary, although this typically requires professional diagnostic tools and expertise. By following this structured approach, you can systematically identify and address the issue with your speedometer.

What are the common causes for a malfunctioning speedometer in a 2018 Lincoln MKX?

When your 2018 Lincoln MKX speedometer starts to malfunction, it can be frustrating, but understanding the common causes can help you diagnose the problem effectively. One of the primary culprits is often a faulty vehicle speed sensor, which is responsible for relaying speed information to the speedometer. If this sensor is malfunctioning, it can lead to inaccurate readings. Additionally, electrical issues such as blown fuses or damaged wiring can disrupt the speedometer's operation, making it essential to check the vehicle's electrical system. Another potential issue lies within the instrument cluster itself; if the gauge or display is malfunctioning, it can result in erratic speed readings. Furthermore, a defective speedometer head can also cause problems, leading to inconsistent behavior of the speedometer. Lastly, if the speedometer has not been calibrated correctly, it may provide inaccurate speed readings, which is a critical aspect to verify. By systematically checking these common issues, you can effectively troubleshoot and potentially resolve the speedometer malfunction in your Lincoln MKX.

How urgent is it to address the non-functioning speedometer in a 2018 Lincoln MKX?

Addressing a non-functioning speedometer in a 2018 Lincoln MKX is of utmost urgency due to the significant safety risks it poses. Without an accurate speed reading, drivers may unknowingly exceed speed limits, increasing the likelihood of accidents and legal repercussions. Moreover, a malfunctioning speedometer can indicate deeper issues within the vehicle's systems, which, if left unresolved, could lead to more severe damage and costly repairs. Timely intervention not only ensures compliance with traffic regulations but also maintains the vehicle's overall performance and reliability. Therefore, it is crucial for owners to prioritize this issue to safeguard their safety and the integrity of their vehicle.

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2018 Lincoln MKX Speedometer Issues: Causes & Repairs