2018 Audi RS3 Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2018 Audi RS3 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 2018 Audi RS3 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.

What steps should I take to diagnose the cruise control issue in my 2018 Audi RS3?

To effectively diagnose the cruise control issue in your 2018 Audi RS3, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable problem that can disrupt functionality. Next, examine the cruise control buttons on your steering wheel to ensure they are operational, as faulty buttons can lead to malfunctions. Utilizing an OBD-II scanner is a crucial step; it allows you to identify any error codes that may indicate specific issues within the cruise control system. Following this, check the speed sensors, as they play a vital role in maintaining a consistent speed; any malfunction here can directly affect cruise control performance. Additionally, inspect the wiring connections for any signs of damage or looseness, as faulty wiring can impede the system's operation. 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 efficiently identify and address the cruise control problem in your Audi RS3.

What are the common problems that could cause the cruise control to stop working in a 2018 Audi RS3?

When the cruise control in a 2018 Audi RS3 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty cruise control switch, which may prevent the system from engaging or disengaging as intended. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a set speed, leading to erratic performance. Another frequent problem is a malfunctioning brake light switch; if this switch fails, it can cause the cruise control to disengage unexpectedly whenever the brakes are applied. Furthermore, a failing throttle actuator can hinder the cruise control's ability to maintain the desired speed, while electrical problems, such as wiring issues or faults, can also interfere with the system's operation. By being aware of these potential issues, you can take the first steps toward troubleshooting and possibly resolving the cruise control malfunction in your Audi RS3.

How urgent is it to address the malfunctioning cruise control in my 2018 Audi RS3?

When it comes to the malfunctioning cruise control in your 2018 Audi RS3, the urgency of addressing the issue cannot be overstated. A malfunctioning system can lead to unexpected acceleration or deceleration, creating significant safety hazards on the road. Moreover, such issues may signal deeper problems within your vehicle's electronic systems or sensors, which can compromise overall performance and drivability. Ignoring these symptoms not only risks your safety but can also lead to increased fuel consumption and potential damage to other vehicle components. By promptly diagnosing and repairing the cruise control malfunction, you can prevent further complications and potentially save on repair costs in the long run. Therefore, it is crucial to take action as soon as you notice any irregularities with your cruise control system to ensure both your safety and the longevity of your vehicle.

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2018 Audi RS3 Cruise Control Issues & Troubleshooting Guide