2024 Subaru Legacy Cruise Control Isn't Working

Troubleshooting Common Issues with the 2024 Subaru Legacy's Cruise Control and How to Fix Them

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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 2024 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 are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2024 Subaru Legacy?

When faced with a non-functioning cruise control in your 2024 Subaru Legacy, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a straightforward issue that can easily disrupt the system. Next, inspect the cruise control buttons on the 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 critical for the cruise control to operate effectively; any malfunction here could lead to failure. Utilizing an OBD-II scanner to check for error codes can provide further insights into potential issues, guiding your next steps. Additionally, ensure that the brake lights are functioning correctly, as a faulty brake light switch can inadvertently disable the cruise control. Lastly, if your vehicle's cruise control relies on vacuum lines, inspect these for any leaks or damage that could hinder performance. By methodically working through these steps, you can effectively diagnose and potentially resolve the cruise control issue in your Subaru Legacy.

What are the common problems that could cause the cruise control to stop working in a 2024 Subaru Legacy?

When your 2024 Subaru Legacy's cruise control stops functioning, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the first things to check is the brake light switch; if this switch is faulty, it may prevent the cruise control from engaging since the system is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the vehicle's ability to maintain a constant speed, leading to cruise control failure. It's also wise to inspect the fuses related to the cruise control system, as a blown fuse can easily halt its operation. Furthermore, a malfunction in the throttle control system, particularly with the throttle position sensor, can impede the cruise control's functionality. Lastly, don't overlook the possibility of vacuum leaks in the engine, as these can significantly affect the performance of the cruise control system. By systematically checking these components, you can effectively troubleshoot and potentially resolve the cruise control issues in your Subaru Legacy.

How urgent is it to address the malfunctioning cruise control in a 2024 Subaru Legacy?

When it comes to the malfunctioning cruise control in your 2024 Subaru Legacy, the urgency of addressing the issue cannot be overstated. A malfunctioning cruise control system not only diminishes the convenience of your driving experience but also poses significant safety risks. If the system fails, it could lead to unexpected acceleration or deceleration, which can be dangerous, especially in high-speed situations. Moreover, neglecting this issue may result in further complications that could lead to costly repairs down the line. Regular maintenance and prompt repairs are crucial for ensuring the longevity and optimal performance of your vehicle. Therefore, it is highly advisable to prioritize the repair of your cruise control system to maintain both your safety on the road and the overall health of your Subaru Legacy.

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