2018 Audi A3 Sportback E-tron Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2018 Audi A3 Sportback e-tron

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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 2018 Audi A3 Sportback e-tron 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 2018 Audi A3 Sportback e-tron 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 A3 Sportback e-tron?

To effectively diagnose the non-functioning cruise control in your 2018 Audi A3 Sportback e-tron, 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; a blown fuse is a straightforward fix that can often resolve the issue. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can hinder functionality. Following this, verify the operation of the speed sensor, which is crucial for the cruise control system to work correctly. Utilizing an OBD-II scanner can help you identify any error codes that may indicate specific problems within the system. Additionally, check the wiring connections associated with the cruise control for any loose or corroded wires that could disrupt the system's operation. If these preliminary checks do not yield results, testing the cruise control module itself may be necessary, as a malfunctioning module could require replacement or repair. Should you find yourself unable to diagnose the issue after these steps, consulting a professional mechanic or an authorized Audi service center is advisable for a thorough assessment. By following this structured diagnostic approach, you can efficiently identify the root cause of your cruise control malfunction.

What are the common problems that could cause the cruise control to malfunction in a 2018 Audi A3 Sportback e-tron?

When troubleshooting cruise control malfunctions in a 2018 Audi A3 Sportback e-tron, it's essential to be aware of several common problems that may arise. A faulty speed sensor is often at the forefront, as it plays a critical role in maintaining the vehicle's set speed; if it fails, the cruise control may not function correctly. Additionally, the brake light switch can be a culprit, as any issues here might cause the system to disengage unexpectedly, even when the brakes are not applied. Another area to investigate is the throttle control system, which can impact the cruise control's ability to maintain a steady speed if it malfunctions. Electrical issues, such as blown fuses or wiring problems, can also disrupt the cruise control functionality, making it vital to check the vehicle's electrical system. Lastly, software glitches within the onboard computer can lead to erratic behavior of the cruise control system. By understanding these potential issues, DIY enthusiasts can better diagnose and address cruise control problems, ensuring a safer and more reliable driving experience.

How urgent is it to address the malfunctioning cruise control in a 2018 Audi A3 Sportback e-tron?

Addressing a malfunctioning cruise control in your 2018 Audi A3 Sportback e-tron is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. Moreover, such issues may be indicative of deeper electronic system problems that could compromise other vehicle functions, further endangering your safety. Ignoring these symptoms can also lead to decreased fuel efficiency and may result in costly repairs down the line. Therefore, it is essential to prioritize the diagnosis and repair of your cruise control system to ensure your vehicle operates safely and efficiently, preserving both your safety and the longevity of your Audi.

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2018 Audi A3 Sportback e-tron Cruise Control Issues & Fixes