2018 Mazda 6 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Mazda 6 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 2018 Mazda 6 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 2018 Mazda 6 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 are the steps to diagnose the cruise control issue in a 2018 Mazda 6?

When diagnosing a cruise control issue in a 2018 Mazda 6, 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 in the fuse box, as a blown fuse can often be the culprit behind a malfunctioning system. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as any malfunction here can prevent the system from engaging. Utilizing an OBD-II scanner to scan for error codes can provide critical insights into any underlying issues, guiding your next steps. Additionally, examine the speed sensors, as faulty sensors can disrupt the cruise control's ability to maintain speed. It's also important to check the brake and clutch switches, which are designed to disengage the system when necessary. If these preliminary checks do not resolve the issue, testing the cruise control module itself may be required, as it is the component that controls the system's operation. By following this structured diagnostic approach, you can effectively identify and address the root cause of the cruise control problem in your Mazda 6.

What are the common issues that could cause the cruise control to stop working in a 2018 Mazda 6?

When troubleshooting the cruise control system in a 2018 Mazda 6, 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 crucial for disengaging the cruise control when the brake is applied. If this switch malfunctions, it can prevent the system from engaging properly. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to cruise control failure. Another potential issue is a blown fuse, which can completely disable the cruise control system. Furthermore, a malfunctioning throttle actuator, responsible for adjusting the engine's throttle, can also impact cruise control functionality. Lastly, any electrical problems, such as wiring issues or a faulty control module, can result in the cruise control system not working as intended. For DIY enthusiasts, identifying these common issues can be the first step in diagnosing and potentially fixing the cruise control problem, although consulting a professional mechanic may still be advisable for complex repairs.

How urgent is it to address the malfunctioning cruise control in my 2018 Mazda 6?

When it comes to the malfunctioning cruise control in your 2018 Mazda 6, the urgency of addressing the issue cannot be overstated. A faulty cruise control system can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant safety risk, especially on highways or busy roads. Moreover, these issues may be indicative of deeper electronic system or sensor problems that could compromise your vehicle's overall performance and safety. Ignoring these symptoms not only jeopardizes your safety but can also lead to decreased fuel efficiency and potential damage to other vehicle components, resulting in more costly repairs down the line. Therefore, it is crucial to have your cruise control system inspected and repaired by a qualified mechanic as soon as possible to mitigate any risks and ensure a safe driving experience. Taking prompt action will help maintain your vehicle's performance and protect you and your passengers on the road.

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2018 Mazda 6 Cruise Control Not Working: Causes & Repairs