2018 Subaru Forester Speedometer Isn't Working

Diagnosing the Causes of a Non-Functional Speedometer in Your 2018 Subaru Forester and How to Fix It

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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 Subaru Forester 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 Subaru Forester?

To effectively diagnose a non-functioning speedometer in your 2018 Subaru Forester, begin with the simplest solutions. 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, proceed to inspect the speed sensor located on the transmission; this component is crucial for relaying speed data to the speedometer. Ensure that the sensor is not damaged or disconnected. Next, examine the wiring connections to both the speed sensor and the speedometer itself, as loose or frayed wires can hinder functionality. If these preliminary checks do not resolve the issue, you may need to test the speedometer cluster, which could require specialized diagnostic tools. Should you find yourself unable to pinpoint the problem after these steps, it is wise to consult a professional mechanic who has experience with Subaru vehicles, as they can provide further insights and solutions. By following this structured diagnostic approach, you can efficiently identify the cause of your speedometer issues and take appropriate action.

What are the common causes for a malfunctioning speedometer in a 2018 Subaru Forester?

When your speedometer in a 2018 Subaru Forester is not functioning correctly, it can be frustrating, but understanding the common problems can help you diagnose the issue 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, you may notice inaccurate readings or a complete failure of the speedometer. Additionally, check for any faulty wiring or connections, as these can lead to erratic speedometer behavior. Another potential issue could be within the instrument cluster itself, where a malfunctioning gauge or circuitry can disrupt the speedometer's operation. Don't overlook the possibility of a blown fuse, as this can also affect the speedometer's functionality. Lastly, consider the vehicle's computer system, which plays a crucial role in communicating with the speedometer; any issues here can lead to malfunctions. By systematically checking these areas, you can identify and address the root cause of your speedometer problems, ensuring a smoother and safer driving experience.

How urgent is it to repair the non-functioning speedometer in a 2018 Subaru Forester?

Repairing a non-functioning speedometer in a 2018 Subaru Forester is an urgent matter that should not be overlooked. The legal implications of driving without a working speedometer can lead to fines and penalties, making it essential for compliance with traffic laws. Moreover, safety is a paramount concern; a malfunctioning speedometer can hinder your ability to gauge your speed accurately, increasing the risk of accidents and unsafe driving conditions. Additionally, the speedometer plays a crucial role in monitoring your vehicle's performance, and ignoring this issue could mask other underlying problems that may arise. Lastly, if you plan to sell your vehicle in the future, a non-functioning speedometer can significantly decrease its resale value, as potential buyers may be deterred by the need for repairs. Therefore, addressing this issue promptly is vital for ensuring your safety, maintaining legal compliance, and preserving the value of your Subaru Forester.

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