2010 Mazda RX-8 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2010 Mazda RX-8 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 2010 Mazda RX-8 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 2010 Mazda RX-8 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.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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.

What are the steps to diagnose the non-functioning cruise control in a 2010 Mazda RX-8?

To effectively diagnose the non-functioning cruise control in your 2010 Mazda RX-8, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, verify the functionality of the cruise control switch; a malfunctioning switch can prevent the system from engaging. Following this, examine the brake pedal switch, which is crucial for disengaging the cruise control when brakes are applied; if this switch is faulty, it can disable the entire system. Utilizing an OBD-II scanner to check for error codes can provide insights into specific problems affecting the cruise control. Additionally, inspect the speed sensor to ensure it is accurately relaying information to the cruise control module, as a faulty sensor can disrupt functionality. If all these components check out, consider examining the cruise control module itself for any signs of damage or malfunction, as replacing a defective module may be necessary to restore proper operation. By following this structured diagnostic approach, you can efficiently identify and address the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2010 Mazda RX-8?

When troubleshooting the cruise control system in a 2010 Mazda RX-8, it's essential to understand the common problems that may lead to its failure. One frequent issue is a faulty cruise control switch, which can hinder the system's ability to engage or disengage properly. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to function, while a defective speed sensor may prevent the system from accurately maintaining the vehicle's speed. Vacuum leaks in the engine can also impact the cruise control's performance, as they can interfere with the system's ability to maintain a steady speed. Furthermore, problems with the brake light switch can cause the cruise control to disengage unexpectedly when the brakes are applied, and a malfunctioning throttle cable can prevent the system from adjusting the throttle position as needed. Identifying these issues can help you effectively diagnose and address the problem, ensuring your cruise control operates smoothly once again.

How urgent is it to repair the non-functioning cruise control in a 2010 Mazda RX-8?

When evaluating the urgency of repairing the non-functioning cruise control in your 2010 Mazda RX-8, it's essential to recognize the potential consequences of inaction. While the immediate safety risks may not seem critical, a malfunctioning cruise control system can lead to unexpected acceleration or deceleration, which poses a significant safety hazard on the road. Additionally, the absence of this feature can detract from the overall driving experience, making long trips more tiring and less enjoyable. Furthermore, neglecting this repair could impact the vehicle's resale value; prospective buyers often look for well-maintained features, and a non-functioning cruise control could be a red flag. Therefore, while it may not be an emergency, addressing the issue promptly is advisable to ensure safety, comfort, and the long-term value of your vehicle.

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