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 une…

 
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.