2020 Audi TTS Quattro Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2020 Audi TTS Quattro

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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 2020 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 2020 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 2020 Audi TTS Quattro?

To effectively diagnose the non-functioning cruise control in your 2020 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. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, as malfunctioning buttons can disrupt the system. Following this, verify the speed sensors, since faulty sensors can prevent the cruise control from engaging. It’s also crucial to check the brake and clutch switches, as these components are designed to disable cruise control for safety when engaged. If these initial checks do not reveal the problem, utilize a diagnostic scanner to identify any error codes that may indicate specific issues within the cruise control system. Additionally, inspect the wiring and connections for any signs of damage or looseness, as these can interfere with the system's functionality. If you still cannot determine the cause of the malfunction after these steps, it may be time to consult a professional mechanic or an authorized Audi service center for a comprehensive diagnosis and repair. By following this structured approach, you can efficiently troubleshoot the cruise control issue and potentially restore its functionality.

What are the common problems that could cause the cruise control to stop working in a 2020 Audi TTS Quattro?

When troubleshooting the cruise control system in a 2020 Audi TTS Quattro, it's essential to understand the common problems that may lead to its failure. One of the primary culprits 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, issues 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 issue is a malfunction in the throttle control system, which may involve a faulty throttle position sensor or actuator, both of which are critical for the cruise control to function effectively. Electrical problems, such as blown fuses or wiring issues, can also impede the cruise control's operation, as can vacuum leaks in the engine system that affect the necessary vacuum pressure for proper functionality. By identifying and addressing these common issues, Audi TTS Quattro owners can effectively troubleshoot and potentially resolve their cruise control problems.

How urgent is it to address the non-functioning cruise control in a 2020 Audi TTS Quattro?

Addressing a non-functioning cruise control in a 2020 Audi TTS Quattro is crucial for both safety and vehicle performance. When cruise control fails, it not only diminishes the convenience of maintaining a steady speed, which is particularly beneficial during long drives, but it may also signal deeper issues within the vehicle's systems. Ignoring this malfunction could lead to more severe problems, potentially compromising the vehicle's overall functionality and safety. For instance, a malfunctioning cruise control could indicate electrical or mechanical failures that, if left unchecked, might escalate into costly repairs or even hazardous driving conditions. Therefore, it is advisable to diagnose and repair the cruise control issue promptly to ensure a safe and comfortable driving experience, especially on highways where the feature is most beneficial. Taking swift action can prevent further complications and enhance the longevity of your vehicle.

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