2018 Audi R8 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2018 Audi R8

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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 2018 Audi R8 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.

What steps should I take to diagnose the non-functioning cruise control in my 2018 Audi R8?

To effectively diagnose the non-functioning cruise control in your 2018 Audi R8, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, since malfunctioning buttons can prevent engagement. If these initial checks do not resolve the issue, use an OBD-II scanner to identify any error codes that may indicate specific problems within the cruise control system. Following this, verify the speed sensors, as faulty sensors can hinder the cruise control from activating. Additionally, examine the wiring connections for any signs of damage or loose connections, which can also lead to malfunctions. If all else fails, test the cruise control module itself, as a defective module is a common culprit. Should you still be unable to pinpoint the issue, it may be wise to consult a professional mechanic or an Audi dealership for expert assistance. By systematically addressing these areas, you can effectively troubleshoot and potentially resolve the cruise control issue in your Audi R8.

What are the common problems that could cause the cruise control to stop working in a 2018 Audi R8?

When dealing with a non-functional cruise control system in a 2018 Audi R8, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty speed sensor, which can disrupt the system's ability to detect the vehicle's speed accurately, preventing it from engaging or maintaining speed. Additionally, a malfunctioning brake light switch can interfere with the system's operation, as it may fail to disengage when the brakes are applied. Another potential issue is a blown fuse, which can cut off power to the cruise control system entirely. Throttle control problems, such as a stuck throttle or issues with the throttle position sensor, can also hinder the system's performance by preventing it from maintaining a steady speed. Lastly, electrical problems, including wiring issues or a malfunctioning control module, can lead to the cruise control system's failure. By identifying these common issues, DIY enthusiasts can take the first steps toward diagnosing and potentially resolving the cruise control problems in their Audi R8.

How urgent is it to address the malfunctioning cruise control in my 2018 Audi R8?

When it comes to your 2018 Audi R8, addressing a malfunctioning cruise control system is not just a matter of convenience; it is a critical safety concern that demands immediate attention. A malfunction can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant risk to both you and other road users. Moreover, ignoring these symptoms can compromise your vehicle's overall performance, leading to further complications that may affect its drivability and longevity. Timely intervention not only ensures that your Audi R8 remains in peak condition but also helps you avoid costly repairs down the line. Therefore, if you notice any irregularities with your cruise control, it is essential to act swiftly to safeguard your safety, maintain optimal vehicle performance, and protect your investment.

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