2021 Audi TTS Quattro Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2021 Audi TTS Quattro

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Reviewed by
Bo Fader
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 2021 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 2021 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 2021 Audi TTS Quattro?

To effectively diagnose the non-functioning cruise control in your 2021 Audi TTS Quattro, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse in the fuse box; a blown fuse is an easy fix that can often resolve the issue. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can hinder functionality. If the buttons are in good condition, proceed to verify the speed sensors, as faulty sensors can disrupt the cruise control system's operation. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, inspect the brake and clutch switches, as malfunctioning switches can prevent the cruise control from engaging. Finally, take a close look at the wiring connections associated with the cruise control system, ensuring there are no loose or damaged wires. If these steps do not resolve the problem, it may be time to consult a professional mechanic or an authorized Audi service center for further assistance. This methodical approach not only helps in identifying the root cause but also saves time and resources in the troubleshooting process.

What are the common problems that could cause the cruise control to stop working in a 2021 Audi TTS Quattro?

When troubleshooting the cruise control system in a 2021 Audi TTS Quattro, it's essential to be aware of several common problems that could be at play. One frequent culprit is a faulty cruise control switch, which may prevent the system from engaging or disengaging as intended. Additionally, issues with the speed sensor can lead to inaccurate speed readings, causing the cruise control to malfunction. Another critical component to check is the brake light switch; if this switch is malfunctioning, it can disrupt the cruise control system since it is designed to disengage when the brakes are applied. Furthermore, a failure in the throttle actuator can hinder the system's ability to maintain the desired speed effectively. Lastly, electrical problems such as wiring issues or blown fuses can also interfere with the cruise control's functionality. By systematically diagnosing these areas, DIY enthusiasts can identify and address the root cause of cruise control issues, potentially restoring its functionality without the need for professional assistance.

How urgent is it to address the non-functioning cruise control in a 2021 Audi TTS Quattro?

When it comes to a non-functioning cruise control in a 2021 Audi TTS Quattro, the urgency of addressing the issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks and potential damage to your vehicle. Cruise control is designed to enhance driving comfort and efficiency, but if it fails, it may signal deeper issues within the vehicle's systems that require attention. For DIY enthusiasts, it's crucial to recognize that a malfunctioning cruise control could be indicative of electrical faults, sensor failures, or even problems with the throttle system. Ignoring these symptoms not only compromises your driving experience but could also escalate into more severe mechanical failures, leading to costly repairs down the line. Therefore, taking the time to diagnose and address the cruise control issue promptly is essential for maintaining the safety and performance of your Audi TTS Quattro.

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2021 Audi TTS Quattro Cruise Control Issues & Repair Costs