2019 Audi A8 Quattro Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2019 Audi A8 Quattro

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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 2019 Audi A8 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 2019 Audi A8 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 cruise control issue in my 2019 Audi A8 Quattro?

When diagnosing the cruise control issue in your 2019 Audi A8 Quattro, 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 malfunctions. 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 that the speed sensors are functioning correctly, as they are vital for maintaining speed. Don't overlook the importance of examining wiring connections for any damage or loose ends, as these can also impede the system's performance. If these steps do not resolve the issue, it may be time to consult a professional mechanic or an authorized Audi service center, where experts can provide a thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the cruise control problem in your Audi A8 Quattro.

What are the common problems that could cause the cruise control to stop working in a 2019 Audi A8 Quattro?

When the cruise control in your 2019 Audi A8 Quattro ceases to function, 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 accurately gauge your vehicle's speed. If this sensor malfunctions, the cruise control may fail to engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the system, as it is designed to deactivate when the brake pedal is pressed. A malfunctioning switch may prevent activation or cause unexpected disengagement. Another potential issue lies within the throttle control system; a faulty throttle position sensor or actuator can hinder the cruise control's ability to maintain speed. Electrical problems, such as blown fuses or wiring issues, can also impede the cruise control's operation, as can software glitches within the vehicle's onboard computer. By identifying these common problems, you can take the first steps toward diagnosing and fixing the cruise control system in your Audi A8 Quattro, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2019 Audi A8 Quattro?

When it comes to a malfunctioning cruise control in a 2019 Audi A8 Quattro, the urgency to address the issue cannot be overstated. A faulty cruise control system can lead to unexpected acceleration or deceleration, creating a significant safety hazard on the road. Moreover, such malfunctions may signal deeper issues within the vehicle's electronic systems or sensors, which could compromise overall drivability and performance. Ignoring these symptoms not only risks your safety but can also result in increased fuel consumption and potential damage to other critical components of the vehicle. By promptly diagnosing and repairing the cruise control system, you can prevent further complications and avoid costly repairs in the future. Therefore, if you notice any irregularities with your cruise control, it is crucial to take action immediately to ensure the continued reliability and safety of your Audi A8 Quattro.

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2019 Audi A8 Quattro Cruise Control Issues & Repairs