2020 Audi TT RS Quattro Cruise Control Isn't Working

Troubleshooting Common Issues with the Cruise Control System in Your 2020 Audi TT RS 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 TT RS 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 TT RS 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 TT RS Quattro?

To effectively diagnose the non-functioning cruise control in your 2020 Audi TT RS Quattro, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on your steering wheel to ensure they are operational, as malfunctioning buttons can hinder functionality. Following this, verify the speed sensors, as faulty sensors can disrupt the cruise control system's performance. It’s also crucial to inspect the wiring connections associated with the cruise control; loose or damaged wires can lead to significant issues. If these preliminary checks do not resolve the problem, utilize a diagnostic scanner to identify any error codes that may provide insight into the underlying issue. Should the problem persist after these steps, consulting a professional mechanic or an authorized Audi service center is advisable for a thorough diagnosis and repair. This methodical approach not only helps in identifying the issue efficiently 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 2020 Audi TT RS Quattro?

When the cruise control in your 2020 Audi TT RS Quattro stops functioning, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the system to maintain the desired speed; if it malfunctions, the cruise control may not operate correctly. Another frequent issue is a defective brake light switch, as this component is designed to disengage the cruise control when the brakes are applied. Additionally, problems with the throttle control system, such as a malfunctioning throttle position sensor, can hinder the cruise control's ability to function properly. Electrical issues, including faulty wiring or blown fuses, can also disrupt the system, leading to failure. Lastly, vacuum leaks in the engine can affect the cruise control's performance, preventing it from maintaining speed consistently. By identifying these potential issues, you can take the first steps toward diagnosing and fixing the cruise control system in your Audi TT RS Quattro.

How urgent is it to address the malfunctioning cruise control in a 2020 Audi TT RS Quattro?

When dealing with a malfunctioning cruise control in a 2020 Audi TT RS Quattro, it is crucial to recognize the urgency of the situation. A malfunctioning cruise control system not only diminishes driving comfort but can also pose significant safety risks. If the system fails to maintain speed or behaves erratically, it could lead to unexpected acceleration or deceleration, increasing the likelihood of accidents. Moreover, ignoring these symptoms can result in further damage to the vehicle, potentially leading to costly repairs down the line. Therefore, it is advisable to address any issues with the cruise control system as soon as they arise. Prompt action not only ensures your safety on the road but also helps maintain the overall performance and efficiency of your vehicle. For those considering a DIY approach, understanding the implications of a malfunctioning system is essential, as it underscores the importance of timely diagnosis and repair.

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2020 Audi TT RS Quattro Cruise Control Issues & Solutions