2013 Audi S8 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2013 Audi S8 and How to Fix Them

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Reviewed by
Aisha
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 2013 Audi S8 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 2013 Audi S8 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 non-functioning cruise control in a 2013 Audi S8?

When diagnosing the non-functioning cruise control in a 2013 Audi S8, it's crucial to follow a methodical diagnostic approach that starts with the simplest solutions before moving on to more complex issues. Begin by checking the cruise control fuse in the fuse box, as a blown fuse is a common and straightforward problem that can easily be fixed. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as any malfunction here can prevent the system from engaging. Utilizing a diagnostic scanner to retrieve error codes from the vehicle's onboard computer can provide insights into potential issues affecting the cruise control system. After that, examine the speed sensors, as faulty sensors can disrupt the cruise control's functionality. It's also important to check the brake and clutch switches, since any failure in these components can inhibit the cruise control from activating. Lastly, conduct a thorough inspection of the wiring and connections related to the cruise control system, as loose or damaged wiring can lead to significant operational problems. By systematically addressing these areas, you can effectively diagnose and resolve the issues with the cruise control in your Audi S8.

What are the common problems that could cause the cruise control to stop working in a 2013 Audi S8?

When troubleshooting the cruise control system in a 2013 Audi S8, it's crucial to recognize the common problems that may lead to its failure. A primary issue could be a faulty brake light switch, which prevents the system from engaging properly if it cannot detect when the brake pedal is pressed. Additionally, problems with the speed sensor can result in inaccurate speed readings, causing the cruise control to malfunction or disengage unexpectedly. Another potential culprit is a malfunctioning throttle actuator, which can hinder the system's ability to maintain a consistent speed. Furthermore, a defective cruise control module may disrupt communication between various components, leading to difficulties in engaging or maintaining the desired speed. Lastly, electrical issues such as blown fuses, wiring problems, or a weak battery can also affect the cruise control's operation. By identifying and addressing these common issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your Audi S8, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2013 Audi S8?

Addressing a malfunctioning cruise control in a 2013 Audi S8 is of utmost importance due to the significant safety risks it poses. When cruise control fails, it can lead to unexpected acceleration or deceleration, which can be dangerous for both the driver and other road users. Additionally, a malfunctioning system detracts from the overall driving experience, making long journeys less convenient and more stressful. Ignoring these symptoms can lead to further complications, potentially damaging other vehicle components and resulting in costly repairs down the line. Therefore, it is crucial to prioritize the repair of cruise control issues to ensure not only the safety and comfort of your driving experience but also to prevent more extensive and expensive problems in the future.

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