2025 Subaru Legacy Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2025 Subaru Legacy

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2025 Subaru Legacy cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
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 cruise control in my 2025 Subaru Legacy?

To effectively diagnose the non-functioning cruise control in your 2025 Subaru Legacy, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can prevent the system from engaging properly. Following this, verify the functionality of the speed sensor, which is crucial for the cruise control to operate correctly; a malfunction here can lead to significant issues. Additionally, check the brake pedal switch, as a faulty switch can disable the cruise control entirely. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may indicate specific faults within the system. Should you still be unable to diagnose the issue, it may be wise to consult a professional mechanic or an authorized Subaru service center, as they possess the specialized knowledge and tools necessary for a thorough diagnosis and repair. By following this structured diagnostic approach, you can efficiently identify and address the underlying issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2025 Subaru Legacy?

When the cruise control in your 2025 Subaru Legacy ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is pressed; if it malfunctions, the system may not engage at all. Additionally, issues with the speed sensor can prevent the cruise control from maintaining a steady speed, as the system relies on accurate speed readings to function properly. Another simple fix could be a blown fuse in the cruise control circuit; checking the fuse box for any damaged fuses and replacing them can often restore functionality. Furthermore, a malfunctioning throttle control system can hinder the cruise control's ability to maintain speed, while problems with the Electronic Control Module (ECM) can disrupt the entire system's operation due to software glitches or malfunctions. Lastly, vacuum leaks in the engine can also affect cruise control performance, so inspecting for and repairing any leaks is essential. By addressing these potential issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your Subaru Legacy, making your DIY repair efforts more successful.

How urgent is it to address the malfunctioning cruise control in a 2025 Subaru Legacy?

Addressing a malfunctioning cruise control in your 2025 Subaru Legacy is not just a matter of convenience; it is a pressing safety concern that requires immediate attention. A malfunction can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents. Moreover, when cruise control fails, drivers may find themselves distracted as they constantly adjust their speed, leading to fatigue and reduced focus on the road. This distraction can be particularly dangerous in high-traffic situations. Additionally, neglecting this issue can result in higher fuel consumption and potential damage to critical components like the engine or transmission, leading to costly repairs down the line. Therefore, it is essential to prioritize the repair of your cruise control system to ensure not only your safety but also the longevity and performance of your vehicle.

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2025 Subaru Legacy Cruise Control Issues & Solutions