2018 Audi TTS Quattro Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2018 Audi TTS Quattro

Find Repair Location
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 2018 Audi TTS 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 2018 Audi TTS 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 steps should I take to diagnose the non-functioning cruise control in my 2018 Audi TTS Quattro?

To effectively diagnose the non-functioning cruise control in your 2018 Audi TTS Quattro, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can prevent engagement. Following this, verify the functionality of the speed sensors located on the wheels, since faulty sensors can disrupt the cruise control's ability to maintain speed. It's also crucial to check the brake and clutch switches, as malfunctioning switches can disable the cruise control entirely. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may provide insight into the issue. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as compromised wiring can lead to malfunctions. By following this structured diagnostic approach, you can efficiently identify and address the underlying issues affecting your cruise control system.

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

When troubleshooting the cruise control system in a 2018 Audi TTS Quattro, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, problems with the brake light switch can disrupt the cruise control functionality, as this switch is designed to deactivate the system when the brakes are applied. Another potential culprit is a malfunctioning throttle actuator, which can impede the cruise control's ability to adjust the throttle position effectively. Furthermore, a defective cruise control module may cause the entire system to fail, necessitating repair or replacement. Lastly, various electrical issues, such as wiring problems or blown fuses, can also impact the cruise control's operation. By identifying and addressing these common issues, DIY enthusiasts can take the first steps toward diagnosing and potentially resolving cruise control problems in their Audi TTS Quattro.

How urgent is it to address the non-functioning cruise control in a 2018 Audi TTS Quattro?

When it comes to a non-functioning cruise control in a 2018 Audi TTS Quattro, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety risks may not be as pronounced as those associated with brake or engine failures, neglecting this issue can lead to more significant problems down the line. A malfunctioning cruise control system often points to underlying electronic or sensor issues that could potentially affect other critical vehicle systems. This not only compromises the convenience of long drives but may also lead to frustration during highway travel where cruise control is typically utilized. Therefore, it is advisable to address the problem promptly. By doing so, you can ensure that your vehicle remains in optimal condition, enhancing both safety and driving comfort. If you're considering a DIY approach, start by checking the fuses and connections related to the cruise control system, as these are common culprits. However, for more complex issues, consulting a qualified mechanic or an authorized Audi service center is recommended to avoid further complications.

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.