How to fix air suspension failure in the 2015 Audi A6 with adaptive air suspension?

 
Identify the Problem
 

• Listen for any unusual noises such as hissing, which may indicate an air leak.
• Check for any warning lights on the dashboard related to the air suspension system.
• Inspect for uneven ride height or the car sagging on one side.

Inspect the Air Springs and Struts

• Visually check the air springs and struts for any visible damage or wear.
• Spray soapy water around these components to look for bubbles, indicating air leaks.

Examine the Air Compressor

• The air compressor is typically located beneath the vehicle or in the trunk.
• Listen for unusual noises from the compressor, which may indicate it's failing.
• Check the relay and fuse for the air compressor, replacing them if burnt out.

Inspect Air Lines and Connections

• Look for kinks, cracks, or disconnections in the air lines running from the compressor to the air springs.
• Ensure all connections are tight and secure.

Check the Height Sensors

• There are usually four height sensors, one at each wheel.
• Inspect the sensors for physical damage and ensure they are connected properly.

Use Diagnostic Tools

• Connect an OBD-II diagnostic tool to the vehicle's port to read any error codes.
• Consult the Audi service manual to interpret the codes and pinpoint the problem.

Perform a Reset

• Sometimes, a system reset can resolve minor software issues.
• Refer to your owner's manual for instructions on resetting the air suspension system.

Professional Repair or Replacement

• If you identify a specific faulty component (air spring, strut, compressor, etc.), you may need to replace it.
• In cases of complex problems, consult a professional mechanic specialized in Audi vehicles.

Final Test

• After performing repairs or replacements, test the vehicle to ensure the air suspension is functioning correctly.
• Drive the car on various road conditions to confirm the issue has been resolved.