2009 Audi A6 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2009 Audi A6 and How to Fix Them

Find Repair Location
Reviewed by
Devin Cabugcal
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 2009 Audi A6 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 Audi A6 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.

What are the steps to diagnose the cruise control issue in a 2009 Audi A6?

When diagnosing a cruise control issue in a 2009 Audi A6, it's crucial to follow a methodical approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, assess the cruise control buttons on the steering wheel to ensure they are working correctly, since malfunctioning buttons can lead to operational issues. Utilizing a diagnostic scanner to check for error codes in the vehicle's onboard computer can provide critical insights into specific problems affecting the cruise control system. Additionally, verify the functionality of the speed sensors, which are essential for the cruise control to operate effectively. It's also important to examine the wiring and connections related to the cruise control system for any signs of damage or corrosion, as these can significantly impede performance. Finally, testing the cruise control module itself will help determine if it is functioning properly, as a malfunctioning module can be the underlying cause of the problem. By adhering to this structured diagnostic approach, you can efficiently identify and resolve cruise control issues in your Audi A6, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2009 Audi A6?

When troubleshooting the cruise control system in a 2009 Audi A6, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging by failing to signal that the brake pedal is not pressed. Additionally, issues with the speed sensor can result in inaccurate speed readings, causing the system to malfunction or disengage unexpectedly. Another potential issue is vacuum leaks within the system, which can disrupt the cruise control's ability to maintain a constant speed. Furthermore, a defective cruise control module may lead to a complete lack of response to commands, rendering the system inoperable. Lastly, electrical problems, such as blown fuses or wiring issues, can also contribute to the cruise control ceasing to function. By identifying and addressing these common problems, you can effectively troubleshoot and restore the cruise control functionality in your Audi A6.

How urgent is it to address the malfunctioning cruise control in my 2009 Audi A6?

Addressing the malfunctioning cruise control in your 2009 Audi A6 is not just a matter of convenience; it is a critical safety concern that requires urgent attention. A malfunctioning system can compromise your ability to maintain a steady speed, increasing the risk of accidents on the road. Moreover, neglecting this issue can lead to more severe problems, potentially affecting other components of your vehicle and resulting in costly repairs down the line. By prioritizing the repair of your cruise control, you not only enhance your driving safety but also safeguard the overall performance and longevity of your Audi A6. Taking prompt action can prevent complications that may arise from ignoring the symptoms, ensuring a smoother and safer driving experience.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.