2020 Porsche 718 Cayman Speedometer Isn't Working

Diagnosing Speedometer Issues in Your 2020 Porsche 718 Cayman and How to Restore Accurate Readings

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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 Porsche 718 Cayman 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 2020 Porsche 718 Cayman?

When diagnosing a non-functioning speedometer in your 2020 Porsche 718 Cayman, it's crucial to follow a methodical diagnostic approach that emphasizes simpler solutions first. Start by checking the fuse related to the speedometer, as a blown fuse is a common issue that can easily disrupt its operation. If the fuse is intact, the next step is to inspect the speed sensor, which is essential for transmitting speed data to the speedometer; any visible damage or malfunction here could be the source of the problem. Following this, examine the wiring connections for signs of corrosion or looseness, as secure and clean connections are vital for the speedometer's functionality. Utilizing a diagnostic scanner to check for error codes can also provide insights into any underlying issues within the speed sensor system. If all these components appear to be functioning correctly, proceed to test the speedometer cluster itself to determine if the issue lies within the unit. By adhering to this structured approach, you can effectively identify and resolve the root cause of your speedometer's malfunction, ensuring a smoother driving experience.

What are the common problems that could cause the speedometer to stop working in a 2020 Porsche 718 Cayman?

When the speedometer in your 2020 Porsche 718 Cayman ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is responsible for relaying speed information to the speedometer; if it malfunctions, you may see inaccurate readings or none at all. Another potential issue is a broken speedometer cable, which can disrupt the connection necessary for the speedometer to display the correct speed. Additionally, a blown fuse in the vehicle's electrical system can interrupt the power supply to the speedometer, leading to failure. Problems within the instrument cluster itself, where the speedometer is housed, can also cause it to stop working, as can faulty wiring that connects the speedometer to the vehicle's systems. Addressing these issues promptly is crucial for maintaining accurate speed monitoring, ensuring both safety and compliance while driving your Porsche.

How urgent is it to address the non-functioning speedometer in a 2020 Porsche 718 Cayman?

Addressing a non-functioning speedometer in your 2020 Porsche 718 Cayman is not just a matter of convenience; it is a pressing issue that requires immediate attention. The legal implications of driving without a functioning speedometer can lead to fines or penalties, as it is a critical component for compliance with traffic laws. Moreover, the safety risks associated with an inaccurate speed reading cannot be overstated; without a reliable speedometer, you may inadvertently exceed speed limits, increasing the likelihood of accidents. Additionally, a malfunctioning speedometer can be indicative of deeper mechanical issues that could compromise your vehicle's overall performance, potentially leading to more costly repairs down the line. Lastly, neglecting this issue can adversely affect your car's resale value, as prospective buyers are likely to be wary of unresolved mechanical problems. Therefore, it is crucial to prioritize the repair of your speedometer to ensure your safety, maintain legal compliance, and protect your investment in your Porsche 718 Cayman.

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