2019 Subaru BRZ Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2019 Subaru BRZ 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 2019 Subaru BRZ 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 2019 Subaru BRZ?

When diagnosing a cruise control issue in a 2019 Subaru BRZ, it's crucial to take a methodical approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, check the cruise control buttons on the steering wheel to ensure they are working properly and not stuck, as this can prevent the system from engaging. Following this, examine the speed sensors, which are essential for the cruise control system's operation, and utilize an OBD-II scanner to identify any error codes that may point to specific issues. Additionally, test the brake and clutch switches, as these components are designed to disengage the cruise control when pressed. It's also important to inspect the vacuum lines connected to the cruise control actuator for any leaks or damage, as these can significantly affect performance. Finally, take a close look at the wiring connections for any loose or frayed wires that could be contributing to the problem. By systematically following these steps, you can effectively diagnose and resolve the cruise control issue in your Subaru BRZ, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2019 Subaru BRZ?

When troubleshooting cruise control issues in a 2019 Subaru BRZ, it's important to consider several common problems that could be at play. One of the first things to check is the fuse associated with the cruise control system; a blown fuse can easily disrupt its functionality. Additionally, the brake pedal switch is crucial, as it is designed to deactivate the cruise control when the brake is engaged. If this switch is faulty, it may prevent the system from activating. Another potential issue lies with the speed sensor; if it malfunctions, the cruise control may struggle to maintain a consistent speed. Furthermore, problems with the throttle control system can interfere with the cruise control's operation, leading to failure. Lastly, a defective cruise control module can also be a significant factor in the system's malfunction. For those looking to DIY, diagnosing these issues can often be done with basic tools and a bit of automotive knowledge, but for more complex problems, consulting a qualified mechanic may be necessary to ensure proper repairs.

How urgent is it to address the malfunctioning cruise control in my 2019 Subaru BRZ?

When it comes to your 2019 Subaru BRZ, addressing a malfunctioning cruise control system is not just a matter of convenience; it is a critical safety concern. A malfunction can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant risk to both you and other road users. Ignoring these symptoms can exacerbate the problem, potentially leading to more extensive damage to the cruise control system or other vehicle components, resulting in costly repairs down the line. Therefore, it is essential to prioritize the inspection and repair of your cruise control system by a qualified mechanic or authorized service center. Taking swift action not only ensures your safety but also helps maintain the overall integrity of your vehicle, allowing you to drive with confidence.

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