2021 Audi A5 Sportback Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2021 Audi A5 Sportback and How to Fix Them

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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 2021 Audi A5 Sportback 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 A5 Sportback 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 are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2021 Audi A5 Sportback?

When troubleshooting the non-functioning cruise control in a 2021 Audi A5 Sportback, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control settings to ensure they are correctly configured and activated. Next, inspect the cruise control buttons on the steering wheel for any signs of malfunction, as faulty buttons can hinder operation. It's also crucial to verify the functionality of the speed sensors, which are vital for the cruise control system to work effectively. Utilizing a diagnostic scanner to check for error codes can provide insights into any underlying issues. Additionally, inspect the fuses related to the cruise control system, as blown fuses can disrupt functionality. Don't overlook the wiring connections; examine them for damage or corrosion that could affect communication between components. Finally, if all else fails, testing the cruise control module may reveal whether it is the source of the problem. By following this structured approach, you can effectively identify and address the issues affecting your vehicle's cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2021 Audi A5 Sportback?

When the cruise control in your 2021 Audi A5 Sportback ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty speed sensor, which is essential for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Another common issue is related to the brake light switch; if this switch is defective, it can cause the cruise control to disengage unexpectedly whenever the brake pedal is pressed. Additionally, problems with the throttle control system can hinder the cruise control's ability to maintain a steady speed, while electrical issues such as faulty wiring or blown fuses can disrupt the entire system's operation. Lastly, vacuum leaks in the system that controls the cruise control can also lead to functionality problems. By identifying these potential issues, you can take the first steps toward troubleshooting and restoring your vehicle's cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2021 Audi A5 Sportback?

Addressing a malfunctioning cruise control system in your 2021 Audi A5 Sportback is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents on the road. Moreover, neglecting this issue can exacerbate the problem, potentially causing more extensive damage to the vehicle's electronic systems, resulting in costly repairs down the line. By prioritizing the repair of your cruise control, you not only enhance your safety but also ensure a smoother and more enjoyable driving experience. Therefore, it is essential to act promptly to mitigate risks and maintain the integrity of your vehicle.

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