2009 Acura RL Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2009 Acura RL 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2009 Acura RL 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 2009 Acura RL 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 initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2009 Acura RL?

When troubleshooting the non-functioning cruise control in a 2009 Acura RL, it's crucial to follow a structured diagnostic approach that prioritizes simpler solutions before delving into more complex issues. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a common and straightforward problem to fix. Next, inspect the cruise control buttons on the steering wheel to ensure they are working properly, since malfunctioning buttons can prevent the system from engaging. After that, verify the speed sensor, which plays a vital role in the cruise control's operation; a faulty sensor can disrupt the entire system. Utilizing an OBD-II scanner to check for any error codes can also provide valuable insights into potential underlying issues. Additionally, confirm that the brake lights are functioning correctly, as a defective brake light switch can inhibit cruise control engagement. Finally, if your vehicle employs vacuum lines for the cruise control system, inspect these for any leaks or damage. By methodically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issue in your Acura RL, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2009 Acura RL?

When the cruise control in a 2009 Acura RL ceases to function, several common issues may be at play. One of the primary culprits is a malfunctioning control module, sensor, or switch, which can disrupt the system's operation. Additionally, problems with throttle actuation can prevent the cruise control from engaging properly. It's also important to inspect the vacuum actuator and its associated hoses, as any damage or leaks can lead to a complete failure of the cruise control system. Furthermore, the cable connecting the actuator may be damaged, which can hinder functionality. Electrical issues, such as blown fuses or more complex wiring problems, can also impact the cruise control's performance. Other potential causes include defective switches, a malfunctioning brake pedal position sensor, or even a check engine light that indicates underlying engine issues. By systematically checking these components, DIYers can effectively diagnose and address the problems affecting the cruise control system in their Acura RL.

How urgent is it to address the malfunctioning cruise control in a 2009 Acura RL?

Addressing a malfunctioning cruise control in a 2009 Acura RL is of utmost urgency due to the significant safety risks it poses. When cruise control fails, it can lead to unpredictable acceleration or deceleration, which can easily result in loss of vehicle control and increase the likelihood of accidents. Additionally, a malfunctioning system can distract the driver, diverting their attention from the road and impairing their ability to react swiftly to changing traffic conditions. Beyond safety concerns, ignoring this issue can lead to higher fuel consumption and may cause further damage to the vehicle's engine or transmission systems. Therefore, it is crucial for owners to prioritize repairs to the cruise control system to ensure both their safety and the longevity of their vehicle.

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