2014 Subaru Legacy Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2014 Subaru Legacy and How to Fix Them

Find Repair Location
Reviewed by
Devin Cabugcal
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 2014 Subaru Legacy cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 steps to diagnose the cruise control issue in a 2014 Subaru Legacy?

When diagnosing a cruise control issue in a 2014 Subaru Legacy, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse, as a blown fuse can often be the culprit behind the malfunction. Refer to your owner's manual for the fuse box diagram to locate the specific fuse associated with the cruise control system. If the fuse is intact, the next step involves inspecting the control module, sensor, and switch, as these components frequently fail and can disrupt the cruise control functionality. Additionally, assess the throttle actuation system, since any problems here can also affect cruise control performance. Pay attention to the speed sensor; if the cruise control fails to engage at the desired speed or if the rev counter behaves erratically, this may indicate a speed sensor issue. Lastly, examine the cruise control switch and the clutch pedal safety switch, as faults in these areas can prevent the system from operating correctly. If these steps do not resolve the issue, consulting a factory-trained technician at an authorized Subaru service center is advisable for a thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address cruise control problems in your Subaru Legacy.

How urgent is it to address the malfunctioning cruise control in my 2014 Subaru Legacy?

Addressing a malfunctioning cruise control in your 2014 Subaru Legacy is not just a matter of convenience; it is a critical safety concern that should be prioritized. When cruise control fails, it can significantly disrupt your driving experience, particularly during long trips where maintaining a steady speed is essential. The malfunction may stem from various issues, including a faulty brake switch or electrical faults, which can compromise the overall functionality of your vehicle. A common first step in troubleshooting is to check for blown fuses, as these can interrupt power to crucial components like the cruise control switch and Speed Sensor (VSS). Additionally, problems with the throttle control system or even a broken vacuum line in older systems can exacerbate the issue. Delaying repairs not only risks further inconvenience while driving but could also lead to more severe complications down the line. Therefore, it is advisable to address any symptoms of malfunction promptly to ensure your safety and maintain the reliability of your vehicle on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.