2018 Buick Regal TourX Speedometer Isn't Working

Fixing Speedometer Malfunction in 2018 Buick Regal TourX

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Reviewed by
Bo Fader
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 Buick Regal TourX 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 2018 Buick Regal TourX?

To diagnose a non-functioning speedometer in a 2018 Buick Regal TourX, start with the simplest solution by checking the fuse associated with the speedometer in the fuse box; a blown fuse is a common culprit that can easily be replaced. Next, inspect the speed sensor located on the transmission, as this component is crucial for relaying speed data to the speedometer; ensure it is not damaged or disconnected. Following this, examine the wiring connections for any signs of looseness, damage, or corrosion, as faulty wiring can disrupt the signal. If these initial checks do not resolve the issue, utilize an OBD-II scanner to scan for error codes that may indicate specific problems within the vehicle's computer system. Additionally, testing the speedometer cluster itself can help determine if it is functioning correctly or if it requires repair or replacement. If all else fails and the speedometer remains non-functional, consulting a professional mechanic is advisable, as they possess the expertise and tools necessary for diagnosing more complex issues. By following this structured diagnostic approach, you can effectively troubleshoot and potentially resolve speedometer problems in your Buick Regal TourX.

What are the common causes for a malfunctioning speedometer in a 2018 Buick Regal TourX?

When troubleshooting a malfunctioning speedometer in a 2018 Buick Regal TourX, it's crucial to consider several common problems that may be at play. One of the primary culprits is a faulty speed sensor, which can result in inaccurate readings or a complete failure of the speedometer. Additionally, electrical issues such as blown fuses or damaged wiring can disrupt the speedometer's operation, making it essential to inspect the vehicle's electrical system. Problems within the instrument cluster itself, including faulty gauges or circuit issues, can also lead to speedometer malfunctions. Furthermore, the vehicle speed sensor, responsible for relaying speed data, may be defective, causing erratic readings or a non-functional speedometer. Lastly, calibration errors can result in incorrect speed readings, necessitating a recalibration to restore accuracy. By understanding these potential issues, DIY enthusiasts can effectively diagnose and address speedometer problems in their Buick Regal TourX.

How urgent is it to repair the non-functioning speedometer in a 2018 Buick Regal TourX?

Repairing a non-functioning speedometer in a 2018 Buick Regal TourX is an urgent matter that should not be overlooked. The speedometer plays a critical role in ensuring that you adhere to legal speed limits, and driving without a functioning gauge can expose you to legal penalties. Beyond legal compliance, the safety of both the driver and passengers is at stake; an inaccurate speed reading can lead to dangerous driving situations, especially in rapidly changing road conditions. Furthermore, a malfunctioning speedometer may signal deeper issues within the vehicle's systems, potentially leading to more significant damage if left unaddressed. Lastly, for those considering resale, a properly functioning speedometer is a basic expectation that can significantly influence a buyer's decision. Therefore, it is essential to prioritize the repair of your speedometer to ensure a safe, compliant, and valuable driving experience.

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