2015 Audi S7 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Audi S7 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 2015 Audi S7 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 S7 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 take when the cruise control isn't working on a 2015 Audi S7?

When faced with a malfunctioning cruise control system in a 2015 Audi S7, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can disrupt the entire system. Next, inspect the cruise control buttons on the steering wheel; faulty buttons may prevent activation. It's also crucial to verify the condition of the speed sensors, which play a vital role in the system's functionality. Utilizing a diagnostic scanner to check for error codes can provide insights into specific issues affecting the cruise control. Additionally, ensure that the brake lights are operational, as a malfunctioning brake light switch can interfere with cruise control engagement. Finally, inspect the wiring connections associated with the cruise control system for any loose or damaged wires. By following these steps, you can effectively diagnose common issues with the cruise control system, paving the way for a potential DIY fix before seeking professional help.

What are the common problems that could cause the cruise control to stop working in a 2015 Audi S7?

When troubleshooting the cruise control system in a 2015 Audi S7, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake pedal switch, which is crucial for disengaging the cruise control when the brake is applied. If this switch malfunctions, it can prevent the system from engaging properly. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain a constant speed, as this sensor provides vital information to the system. Another potential problem is a malfunctioning throttle actuator, which adjusts the engine's throttle based on the cruise control settings; if it fails, the system may not operate as intended. Electrical problems, including blown fuses or wiring issues, can also hinder the cruise control's functionality, as can vacuum leaks within the system that controls its operation. By identifying and addressing these common issues, you can effectively restore the cruise control functionality in your Audi S7.

How urgent is it to address the malfunctioning cruise control in a 2015 Audi S7?

When it comes to a malfunctioning cruise control in a 2015 Audi S7, the urgency of addressing the issue cannot be overstated. A faulty cruise control system can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant safety risk to both the driver and other road users. Moreover, this malfunction may be indicative of deeper electronic system issues or sensor failures that could compromise the overall drivability of the vehicle. Ignoring these symptoms not only increases the likelihood of erratic driving experiences but can also result in higher fuel consumption and potential damage to other critical components of the car. By promptly diagnosing and repairing the cruise control system, you can prevent further complications and avoid costly repairs in the future. Therefore, it is crucial to take immediate action to ensure the safety and performance of your Audi S7.

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Troubleshooting 2015 Audi S7 Cruise Control Problems