2015 Audi A4 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Audi A4 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 2015 Audi A4 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 2015 Audi A4 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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2015 Audi A4?

When faced with a non-functional cruise control in your 2015 Audi A4, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse located in the fuse box; a blown fuse is often a simple yet overlooked culprit. Next, ensure that the cruise control settings are correctly configured on the control stalk or steering wheel buttons, as incorrect settings can prevent activation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues within the vehicle's onboard computer. Additionally, inspect the brake pedal switch, as a malfunctioning switch can inhibit the cruise control from engaging. Finally, examine the cruise control module for any visible damage or signs of malfunction. By following these steps in order, you can effectively narrow down the potential causes of the cruise control failure and take appropriate action to resolve the issue.

What are the common problems that could cause the cruise control to stop working in a 2015 Audi A4?

When troubleshooting the cruise control system in a 2015 Audi A4, it's essential to understand the common problems that may lead to its malfunction. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to operational failures. Another potential problem is a malfunctioning throttle actuator, which is responsible for adjusting the engine's throttle based on the cruise control settings; if it fails, the system may not function as intended. Electrical problems, such as blown fuses or wiring issues, can also interfere with the cruise control's operation. Lastly, a failure in the cruise control module itself can prevent the system from engaging or maintaining the desired speed. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control system in your Audi A4, restoring its functionality and enhancing your driving experience.

How urgent is it to address the malfunctioning cruise control in a 2015 Audi A4?

When it comes to a malfunctioning cruise control in a 2015 Audi A4, the urgency of addressing the issue cannot be overstated. A faulty cruise control system can lead to unexpected acceleration or deceleration, creating a significant safety hazard for both the driver and other road users. Moreover, such malfunctions may signal deeper electronic system or sensor problems that could compromise the vehicle's overall drivability and performance. Ignoring these symptoms not only risks safety but can also result in increased fuel consumption and potential damage to other vehicle components, leading to more extensive and costly repairs. Therefore, it is crucial to diagnose and repair cruise control issues promptly, ensuring the vehicle remains reliable and safe on the road. Taking swift action not only protects your investment but also enhances your driving experience by maintaining optimal vehicle performance.

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