2018 Acura RLX Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2018 Acura RLX

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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 Acura RLX 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 Acura RLX 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 cruise control issue in my 2018 Acura RLX?

When diagnosing a cruise control issue in your 2018 Acura RLX, it's crucial to follow a structured diagnostic approach that prioritizes simpler checks before moving on to more complex assessments. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are working properly, since faulty buttons can lead to operational issues. Utilizing an OBD-II scanner to check for error codes is also essential, as these codes can provide insights into specific problems affecting the cruise control system. Additionally, verify the functionality of the speed sensors, which are vital for the system's operation. It's important to inspect the wiring and connections for any signs of damage or corrosion, as these can hinder connectivity. If these initial checks do not resolve the issue, testing the cruise control module may be necessary, as a malfunctioning module could be the underlying cause. If you are still unable to diagnose the problem after these steps, seeking assistance from a professional mechanic experienced with Acura vehicles can offer the expertise needed for a comprehensive diagnosis and effective repair. By following this methodical approach, you can efficiently identify and address the cruise control issue in your Acura RLX.

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

When troubleshooting cruise control issues in a 2018 Acura RLX, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake pedal switch, which can disrupt the system's ability to engage or disengage properly. Additionally, speed sensor issues can lead to incorrect speed readings, causing the cruise control to malfunction. A blown fuse in the cruise control circuit can also prevent the system from functioning as intended. Furthermore, a malfunctioning throttle actuator may hinder the cruise control's ability to maintain the desired speed. Lastly, problems with the Electronic Control Module (ECM) can interfere with communication between the cruise control system and the vehicle's engine, resulting in operational failures. By identifying and addressing these potential issues, you can effectively troubleshoot and restore functionality to your cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2018 Acura RLX?

Addressing a malfunctioning cruise control system in a 2018 Acura RLX is of utmost importance due to the safety risks it poses. A faulty cruise control can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions and increase the likelihood of accidents. Moreover, timely intervention not only ensures the vehicle's systems operate correctly but also maintains its overall performance and reliability. Ignoring these symptoms can lead to further complications, resulting in more extensive repairs and increased costs. Additionally, a malfunctioning cruise control can detract from the comfort and convenience of long drives, making the driving experience less enjoyable. Therefore, it is crucial to prioritize the repair of the cruise control system to safeguard both the driver and passengers while ensuring a smooth and safe journey.

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2018 Acura RLX Cruise Control Issues & Repair Costs