Check Battery Health

• One of the common reasons for start-stop system malfunctions in the 2017 Audi A6 is a weak or faulty battery. Make sure the battery is fully charged and in good condition. You may need a battery tester to check the battery's health.
• If the battery is old or weak, consider replacing it with a new one that meets the manufacturer's specifications.

Inspect the Wiring and Connections

• Loose or corroded connections can cause the start-stop system to malfunction. Inspect the wiring and connections associated with the system. Ensure they are secure and free from corrosion.
• Clean any dirty or corroded connectors with an appropriate electrical contact cleaner.

Reset the System

• Sometimes, simply resetting the system can resolve the issue. Disconnect the negative terminal of the battery and leave it disconnected for about 15 minutes.
• Reconnect the battery and start the vehicle. This can reset the system and may resolve minor glitches.

Check the Brake Pedal Switch

• The start-stop system relies on input from various sensors, including the brake pedal switch. If this switch is faulty or misaligned, it can disrupt the system’s operation.
• Inspect the brake pedal switch and ensure it is properly aligned and functioning. Replace if necessary.

Examine the Hood Sensor

• The start-stop system may not function if the hood sensor incorrectly indicates that the hood is open. Ensure that the hood is properly closed and the sensor is working correctly.
• If the sensor is faulty, it needs to be replaced.

Software Updates

• The start-stop system’s control units may require software updates for optimal performance. Check with an authorized Audi dealer to see if there are any available updates for your vehicle.
• Have the updates professionally installed to ensure compatibility and functionality.

Professional Diagnosis

• If the problem persists after checking these common issues, it is best to consult a professional mechanic or an authorized Audi service center. They have the necessary diagnostic tools to identify and fix complex issues in the start-stop system.
• Provide them with as much information as possible about the malfunction to help them diagnose the problem accurately.

Preventive Maintenance

• Regular maintenance is key to preventing start-stop system malfunctions. Follow the recommended service intervals for your Audi A6.
• Keep an eye on the vehicle’s health and address any minor issues before they escalate into major problems that could affect systems like the start-stop feature.