2011 Audi A8 Quattro Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2011 Audi A8 Quattro 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 2011 Audi A8 Quattro 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 2011 Audi A8 Quattro 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 initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2011 Audi A8 Quattro?

When troubleshooting the non-functioning cruise control in a 2011 Audi A8 Quattro, it's crucial to start with the simplest checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse; a blown or damaged fuse can easily disrupt the system's functionality. Next, examine the cruise control switch located on the steering wheel to ensure it is operational. It's also important to verify that the brake lights are functioning correctly, as a malfunctioning brake light switch can prevent the cruise control from engaging. Additionally, check the vehicle speed sensor to confirm it is accurately relaying speed information to the cruise control module. Finally, scanning the vehicle's onboard computer for any error codes can provide valuable insights into potential issues affecting the cruise control system. By systematically following these steps, you can effectively diagnose and address the problems with your cruise control.

What are the common problems that could cause the cruise control to stop working in a 2011 Audi A8 Quattro?

When dealing with a malfunctioning cruise control system in a 2011 Audi A8 Quattro, it's important to understand the common problems that could be at play. One frequent issue is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, speed sensor problems can lead to incorrect speed readings, further complicating the functionality of the cruise control. Another critical component is the brake light switch; if this switch is malfunctioning, it may prevent the cruise control from activating since the system is designed to disengage when the brakes are applied. Vacuum leaks can also disrupt the system's performance, making it difficult for the cruise control to maintain a consistent speed. Lastly, a faulty throttle actuator can affect the system's ability to adjust the throttle position accurately. For those looking to troubleshoot these issues, it's advisable to start by checking these components, but for a thorough diagnosis and repair, consulting a qualified mechanic is recommended to ensure the cruise control system is restored to proper working order.

How urgent is it to address the non-functioning cruise control in a 2011 Audi A8 Quattro?

Addressing the non-functioning cruise control in a 2011 Audi A8 Quattro is important, even if it may not seem urgent compared to critical systems like brakes or steering. While the immediate safety risk may be low, neglecting this issue can lead to more significant problems down the line. A malfunctioning cruise control system could be a symptom of underlying electronic or sensor issues that might affect other vehicle functions, potentially leading to safety hazards. Additionally, a properly functioning cruise control system enhances driving comfort and fuel efficiency, making it a valuable feature for long trips. Therefore, it is advisable to have the system diagnosed and repaired by a qualified mechanic as soon as possible to prevent further complications and ensure the vehicle operates safely and efficiently.

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