2019 Acura RLX Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2019 Acura RLX 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 2019 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 2019 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.

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.

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 2019 Acura RLX?

To effectively diagnose the cruise control issue in your 2019 Acura RLX, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse can often be the root cause of the problem. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning correctly, since faulty buttons can prevent the system from engaging. Following this, verify the operation of the speed sensor, which is essential for maintaining the set speed; a malfunctioning sensor can disrupt cruise control functionality. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that your brake lights are operational, as malfunctioning lights can interfere with the cruise control system. It’s also wise to inspect the vacuum lines for any leaks, as these can impact performance. If these initial checks do not resolve the issue, consulting a professional mechanic may be necessary for a comprehensive diagnosis and repair. By following this structured approach, you can efficiently identify and address the cruise control problem in your vehicle.

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

When troubleshooting the cruise control system in a 2019 Acura RLX, it's essential to understand the common problems that may lead to its malfunction. One frequent issue is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, problems with the brake light switch can disrupt the cruise control operation, as the system is designed to deactivate when the brake pedal is pressed; a malfunctioning switch may fail to send the necessary signal for this action. Another potential culprit is a blown fuse within the cruise control system, which can easily be checked and replaced to restore functionality. Furthermore, throttle control malfunctions, such as a stuck throttle or issues with the throttle position sensor, can interfere with the system's performance. Lastly, electrical problems, including damaged or corroded wiring connections, can disrupt communication between the cruise control components, leading to its failure. By identifying and addressing these common issues, DIY enthusiasts can effectively troubleshoot and potentially restore the cruise control functionality in their Acura RLX.

How urgent is it to address the malfunctioning cruise control in my 2019 Acura RLX?

Addressing the malfunctioning cruise control in your 2019 Acura RLX is crucial for several reasons. First and foremost, a malfunction can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. This safety concern is compounded during long drives or highway travel, where consistent speed is essential for comfort and control. Additionally, ignoring the issue can result in higher fuel consumption, as the vehicle struggles to maintain a steady pace. Over time, this neglect may lead to more severe damage to the vehicle's systems, resulting in costly repairs that could have been avoided with prompt attention. Therefore, it is imperative to prioritize the repair of your cruise control system to ensure not only your safety but also the longevity and efficiency of your vehicle.

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2019 Acura RLX Cruise Control Issues & Repair Guide