2018 Audi A4 Allroad Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Audi A4 allroad and How to Fix Them

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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 2018 Audi A4 allroad cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 2018 Audi A4 allroad 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 2018 Audi A4 allroad?

When diagnosing the non-functioning cruise control in your 2018 Audi A4 allroad, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex issues. Start by checking the vehicle's fuse box for any blown fuses, as these are often the primary cause of cruise control malfunctions. If you find a blown fuse, replacing it may restore functionality. Next, inspect the cruise control switch and the vehicle speed sensor (VSS) for any signs of wear or damage, as these components are critical for the system's operation. If the cruise control still does not engage, consider the possibility of issues with the control module, throttle actuation, or the stalk itself. Additionally, be aware that certain driving conditions, such as steep inclines, can temporarily disable the cruise control, which may explain the "cruise control unavailable" message. If these initial troubleshooting steps do not resolve the issue, it may be necessary to consult a professional mechanic for a more thorough diagnosis, especially if you suspect problems with advanced components like radar or front sensors. By following this diagnostic approach, you can effectively identify and address the root cause of your cruise control issues.

How urgent is it to address the non-functioning cruise control in a 2018 Audi A4 allroad?

Addressing the non-functioning cruise control in your 2018 Audi A4 allroad should not be overlooked, as it can lead to significant safety risks and performance issues. A malfunctioning cruise control system can affect your vehicle's acceleration and speedometer functionality, which are critical for safe driving. Moreover, if the Engine Light or Service Engine Soon Warning Light is illuminated alongside the cruise control failure, it indicates a deeper issue that requires immediate attention from a qualified mechanic. Common causes of cruise control problems, such as failed control modules or electrical issues, can escalate if left unaddressed, potentially leading to more extensive and costly repairs. By troubleshooting and fixing the cruise control promptly, you not only enhance your driving experience by reducing fatigue and improving fuel efficiency but also ensure the overall safety and reliability of your vehicle. Therefore, while it may not seem like an emergency, timely intervention is crucial to prevent further complications and maintain optimal vehicle performance.

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Cruise Control Malfunction in 2018 Audi A4 Allroad