2017 Audi S5 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Audi S5 and How to Fix Them

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Reviewed by
Devin Cabugcal
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 2017 Audi S5 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 2017 Audi S5 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 steps to diagnose the cruise control issue in a 2017 Audi S5?

When diagnosing a cruise control issue in a 2017 Audi S5, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to engagement problems. Utilizing an OBD-II scanner to check for error codes is a crucial step, as it can reveal specific issues affecting the cruise control system. Additionally, verify the speed sensors, which are vital for the cruise control's operation; any malfunction here can cause significant issues. It's also important to examine the wiring and connections for signs of damage or corrosion, as poor connections can hinder performance. Finally, testing the cruise control module itself will help determine if it is functioning correctly, as a defective module can prevent the system from engaging altogether. By following this structured diagnostic approach, you can effectively identify and resolve the underlying issues affecting the cruise control in your Audi S5.

What are the common problems that could cause the cruise control to stop working in a 2017 Audi S5?

When troubleshooting the cruise control system in a 2017 Audi S5, it's essential to be aware of several common problems that could lead to its malfunction. One of the primary culprits is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, ultimately causing the cruise control to fail. Additionally, issues with the brake light switch can result in the cruise control disengaging unexpectedly whenever the brake pedal is pressed, creating an inconsistent driving experience. Another potential issue is a malfunctioning throttle actuator, which can hinder communication between the cruise control system and the engine, preventing it from maintaining the desired speed. Furthermore, a defective cruise control module itself may be at fault, as it is responsible for engaging the system and ensuring it operates correctly. Lastly, various electrical problems, such as wiring issues or blown fuses, can also interfere with the cruise control's functionality. By understanding these common problems, DIY enthusiasts can better diagnose and address the issues affecting their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2017 Audi S5?

When it comes to the non-functioning cruise control in a 2017 Audi S5, understanding the urgency of the situation is crucial for any DIY enthusiast. While it may not seem like an immediate emergency, neglecting this issue can lead to more significant problems down the line. The cruise control system is integral to maintaining a steady speed, especially during long drives, which not only enhances comfort but also improves fuel efficiency. If the system is malfunctioning, it could signal deeper electronic issues or sensor failures that might compromise the vehicle's overall performance and safety. Therefore, it is advisable to investigate the problem sooner rather than later. By doing so, you can prevent potential safety hazards and ensure that your vehicle operates as intended. For those inclined to tackle the repair themselves, a thorough inspection of the cruise control components, including the fuses, wiring, and sensors, can be a good starting point. However, if the issue persists, consulting a qualified mechanic or dealership is recommended to accurately diagnose and resolve the malfunction, ensuring your Audi S5 remains safe and reliable on the road.

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