2018-2021 Audi A6/A7 Air Suspension Pressure Reading Incorrect TSB

Symptoms

Owners of 2018-2021 Audi A6 and A7 vehicles equipped with adaptive suspension will typically not experience any noticeable driving concerns related to this condition. The issue is primarily detected during pre-delivery inspection (PDI) or other diagnostic work performed by a technician.

During diagnostic checks, specifically when using the ODIS tester (address word 0074) to assess the compressor output, the measured value for "Accumulator pressure and/or System pressure" may be shown as over 25 bar. It is crucial to understand that "The pressure shown over 25 bar is not the actual pressure in the system." This means the diagnostic display provides an erroneous reading, not an indication of an actual pressure fault in the air suspension.

Technical Background

This discrepancy originates from specific versions of the suspension control module, identified as J775 (address word 0074). In these particular modules, the measured value for "Accumulator pressure and/or System pressure" is shown incorrectly when viewed through the ODIS diagnostic tester. The system itself is functioning correctly, but the diagnostic tool displays an inaccurate value, leading to the Audi A6 air suspension pressure incorrect reading.

Repair Procedure Summary

When technicians encounter an ODIS tester reading for "Accumulator pressure and/or System pressure" that appears to be over 25 bar, and this reading is suspected to be incorrect, a specific diagnostic procedure is recommended. Technical Service Bulletin 2062932/1 instructs the use of a special tool designed for air suspension diagnostics. This tool, the VAS 751 001, is used to directly determine the actual pressure within the system. By doing so, technicians can accurately check the compressor output and confirm whether the displayed Audi A6 air suspension pressure incorrect reading is merely a diagnostic anomaly or if there is an underlying issue.

Required Tools or Parts

To accurately diagnose and verify the air suspension pressure when an incorrect reading is observed, the following special tool is required:

• Tool Number: VAS 751 001
• Tool Description: Tester for leak detection on the air suspension

Important Warnings

Technical Service Bulletin 2062932/1, issued on April 9, 2021, is provided for informational purposes only. It explicitly states that it is "not applicable to any Audi Warranty." This means that any diagnostic or repair work performed in relation to the conditions described in this bulletin will not be covered under the standard Audi warranty terms.

NHTSA ID: 10190276