2018 Subaru Crosstrek Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Subaru Crosstrek and How to Fix Them

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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 2018 Subaru Crosstrek 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 steps to diagnose the cruise control issue in a 2018 Subaru Crosstrek?

To effectively diagnose a cruise control issue in a 2018 Subaru Crosstrek, it's essential to adopt a systematic approach that begins with the simplest checks before progressing to more complex diagnostics. Start by inspecting the cruise control fuse, as a blown or damaged fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational and not stuck, as this can prevent engagement. Following this, check the speed sensors, which are vital for the cruise control system to function correctly. Utilizing an OBD-II scanner to scan for error codes can provide valuable insights into any underlying issues. Additionally, verify that the brake lights are functioning properly, since a faulty brake light switch can inadvertently disable the cruise control. If these preliminary checks do not reveal the problem, proceed to test the cruise control module to ensure it is sending the correct signals. Finally, inspect the wiring and connections for any signs of damage or corrosion, as these can also lead to malfunction. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control issue in your Subaru Crosstrek.

What are the common problems that could cause the cruise control to stop working in a 2018 Subaru Crosstrek?

When troubleshooting cruise control issues in a 2018 Subaru Crosstrek, it's essential to understand the common problems that may be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging properly. If this switch malfunctions, the system may not activate when the brakes are applied, leading to frustration during your drive. Additionally, speed sensor issues can disrupt the cruise control's ability to maintain a consistent speed, causing it to disengage unexpectedly. Another potential problem is a blown fuse within the cruise control system; checking the fuse box for any blown fuses and replacing them can often resolve the issue. Furthermore, a malfunction in the throttle control system can hinder the cruise control's performance, making it difficult to maintain the desired speed. Lastly, problems with the Electronic Control Module (ECM) can also affect cruise control functionality, as this module oversees various vehicle operations. By systematically checking these components, you can effectively diagnose and potentially fix the cruise control problems in your Subaru Crosstrek.

How urgent is it to address the malfunctioning cruise control in my 2018 Subaru Crosstrek?

When it comes to your 2018 Subaru Crosstrek, addressing a malfunctioning cruise control system is not just a matter of convenience; it is a critical safety concern. A malfunction can lead to unexpected acceleration or deceleration, which poses significant risks while driving. Moreover, neglecting this issue can adversely affect your vehicle's fuel efficiency and overall performance, leading to more costly repairs down the line. By promptly diagnosing and fixing the cruise control problem, you not only enhance your driving safety but also protect the integrity of your vehicle's systems. Therefore, it is essential to prioritize this repair to ensure a safe and efficient driving experience.

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