Audi RS6 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Audi RS6 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Audi RS6 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 Audi RS6 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.

Troubleshooting Cruise Control Issues in an Audi RS6

When troubleshooting cruise control issues in your Audi RS6, it's essential to adopt a systematic diagnostic approach. Start by checking the simplest components first, such as the fuses and brake lights, as these are often the culprits behind cruise control malfunctions. A blown fuse or a faulty brake switch can easily disrupt the system's functionality. Next, inspect the control module, sensors, and switches for any visible signs of damage or wear. If these components appear intact, move on to the throttle actuation system, ensuring it operates smoothly without any obstructions. Additionally, verify that all wiring connections related to the cruise control system are secure and free from damage. If you've gone through these steps and the issue persists, it may be time to consult a professional mechanic or an authorized Audi service center for a more in-depth diagnosis. This methodical approach not only saves time but also helps in identifying the root cause of the problem effectively.

Troubleshooting Cruise Control Issues in an Audi RS6

When troubleshooting cruise control issues in your Audi RS6, it's essential to understand the common problems that may arise. One frequent culprit is a failed control module, sensor, or switch, which can disrupt the entire cruise control system. Additionally, throttle actuation problems can prevent the cruise control from engaging or maintaining speed, so checking the throttle response is crucial. Mechanical faults, such as a malfunctioning cruise control button or debris lodged in the button area, can also hinder functionality. To effectively diagnose these issues, start by inspecting the control module and associated sensors for any signs of wear or damage. Next, ensure that the throttle is operating smoothly and that there are no obstructions affecting the cruise control button. Engaging with online forums like RS6.com can also provide valuable insights from fellow Audi RS6 owners who have faced similar challenges, offering tips and solutions that may help you resolve the issue efficiently.

Why is the Cruise Control Not Working in an Audi RS6?

When the cruise control in your Audi RS6 is malfunctioning, it’s crucial to address the issue promptly. Ignoring symptoms such as unexpected shutdowns or error messages can not only compromise your driving experience but also pose significant safety risks. For instance, if the adaptive cruise control system fails, it may not reactivate when needed, potentially leading to erratic speed control in traffic. Additionally, underlying problems like a defective brake pedal switch or throttle control issues can escalate if left unchecked, resulting in more extensive and costly repairs. Therefore, diagnosing the specific cause of the cruise control failure is essential to ensure your vehicle operates safely and efficiently. Taking immediate action can prevent further damage and enhance your overall driving safety.

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