2021 Audi A5 Quattro Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Audi A5 Quattro

Find Repair Location
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 A5 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 A5 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 are the initial steps to diagnose the cruise control issue in a 2021 Audi A5 Quattro?

When diagnosing a cruise control issue in your 2021 Audi A5 Quattro, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by inspecting the cruise control fuse; a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on your steering wheel for any signs of sticking or malfunction, as these can prevent proper operation. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may indicate specific issues within the cruise control system. Additionally, assess the vehicle speed sensor, as a faulty sensor can hinder the cruise control's ability to maintain speed. Finally, ensure that the brake light switch is functioning correctly, since a malfunction here can disable the cruise control when the brake pedal is engaged. By following this structured diagnostic approach, you can effectively narrow down the potential causes of your cruise control issue and work towards a resolution.

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

When troubleshooting the cruise control system in a 2021 Audi A5 Quattro, it's essential to understand the common problems that may lead to its failure. 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, the brake light switch can be a culprit; if it malfunctions, the cruise control may disengage unexpectedly when the brake pedal is pressed. Another area to investigate is the throttle control system, where a defective throttle position sensor or actuator can disrupt the cruise control's functionality. Electrical problems, such as blown fuses or wiring issues, can also impede the system's operation, as can software glitches that may arise from programming errors. By identifying and addressing these potential issues, DIY enthusiasts can effectively diagnose and resolve cruise control problems in their Audi A5 Quattro.

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

Addressing a malfunctioning cruise control in your 2021 Audi A5 Quattro is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A faulty cruise control system can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. The urgency of this issue cannot be overstated, as neglecting it may result in more severe consequences, including potential collisions. Furthermore, delaying repairs can exacerbate the problem, leading to more extensive damage to your vehicle's systems and ultimately resulting in higher repair costs. 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, if you notice any irregularities with your cruise control, it is advisable to seek professional assistance promptly to maintain the optimal performance of your Audi A5 Quattro.

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.