2019 Mazda CX-9 Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2019 Mazda CX-9 and How to Fix Them

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Reviewed by
Bo Fader
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 Mazda CX-9 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.

How much does it cost to fix a 2019 Mazda CX-9 cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What steps should I take to diagnose the non-functioning cruise control in my 2019 Mazda CX-9?

To effectively diagnose the non-functioning cruise control in your 2019 Mazda CX-9, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box; a blown fuse is an easy fix that can often resolve the issue. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can hinder functionality. Following that, verify the operation of the speed sensor, which is crucial for maintaining your set speed; a malfunction here can lead to cruise control failure. Additionally, check the brake pedal switch, as a faulty switch can prevent the cruise control from engaging altogether. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may indicate specific issues within the cruise control system. Should you still be unable to diagnose the problem, it may be wise to consult a professional mechanic or an authorized Mazda service center for a comprehensive evaluation. 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 2019 Mazda CX-9?

When troubleshooting the cruise control system in a 2019 Mazda CX-9, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch malfunctions, it can prevent the system from engaging. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain a steady speed, as the system relies on accurate speed readings to function correctly. Another potential issue is a blown fuse within the cruise control circuit; inspecting the fuse box for any damaged fuses and replacing them can often resolve the problem. Furthermore, a malfunction in the throttle control system can hinder the cruise control's performance, as it needs to adjust the throttle to maintain the desired speed. Lastly, problems with the Electronic Control Module (ECM), which manages various vehicle functions including cruise control, can also lead to operational failures. By systematically checking these components, you can effectively diagnose and potentially fix the cruise control issues in your Mazda CX-9.

How urgent is it to address the malfunctioning cruise control in a 2019 Mazda CX-9?

When it comes to a malfunctioning cruise control system in a 2019 Mazda CX-9, the urgency of addressing the issue cannot be overstated. A malfunctioning system can lead to unexpected acceleration or deceleration, creating a significant safety hazard for both the driver and other road users. Ignoring these symptoms not only increases the risk of accidents but can also result in more extensive damage to the vehicle's components, leading to costly repairs down the line. Therefore, it is crucial to prioritize the diagnosis and repair of the cruise control system. Consulting with a certified mechanic or an authorized Mazda service center is highly recommended to ensure that the issue is properly addressed, restoring the vehicle's performance and safety. Taking prompt action not only safeguards your well-being but also helps maintain the integrity of your vehicle, making it a wise decision for any responsible car owner.

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