2021-2022 Audi A6 Suspension Malfunction DTC C104807

Symptoms You Might Experience

Owners of affected 2021-2022 Audi A6, A7, S6, and RS models may notice a specific alert in their vehicle's instrument cluster. The primary symptom is a "suspension malfunction warning message" appearing, indicating a problem with the vehicle's suspension system.

Fault Codes / DTCs

When a "suspension malfunction warning message" appears, a technician diagnosing the issue may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the suspension control module, J775 (address word 0074):

Code	Description
C104807	Level control system sensor mechanical malfunction
C103407	Left front level control system sensor mechanical malfunction
C11E2F1	Front axle ride-height control system extremely low level detected

These codes specifically point to mechanical issues or an extremely low level detection within the vehicle's front axle ride-height control system.

Affected Components

The issue primarily involves the vehicle's suspension control module (J775) and the self-leveling sensors. Specifically, part number 4K0 941 285 B, which corresponds to the self-leveling sensor, is a key component under investigation for potential damage or malfunction related to this Audi A6 suspension malfunction C104807.

Important Notes for Owners

Audi Technical Service Bulletin 41 21 00 2065161/1 outlines several critical points:

• No Production Changes: Audi states that no changes to production have been made, as no issues have been identified at the manufacturing level. This suggests the issue is being investigated in the field.
• Warranty Coverage: This TSB is for informational purposes only and is not applicable to Audi Warranty. This means that while your dealer will investigate, the repair may not be covered under standard warranty terms unless otherwise determined.
• Dealer Authorization Required: Before any parts are replaced, dealers are instructed to contact the Audi Technical Assistance Center (TAC). This is to assist Audi in gathering information and diagnosing potential issues related to the Audi A6 suspension malfunction C104807.

What Audi Dealers Are Doing

Audi of America is actively collecting technical information regarding this condition. If you bring your vehicle in for a "suspension malfunction warning message" or related DTCs, here's what your dealer is instructed to do:

1. Verify the Condition: Confirm the warning message and check for the specified part number 4K0 941 285 B, focusing on A6 and A7 models.
2. Contact TAC: If your vehicle is within the New Vehicle Limited Warranty, the dealer must contact a TAC consultant before proceeding with any repairs.
3. Document Damage: Technicians are required to take pictures of the Self Levelling Sensor before disassembly, highlighting any visible damage.
4. Inspect Suspension: A thorough check of the vehicle's suspension, wheels, and tires for any damage or impact is performed, with pictures taken if issues are found.
5. Diagnostic Log: The diagnostic log from the vehicle must be attached to the TAC ticket.
6. Sensor Replacement (If Requested): If the TAC consultant authorizes sensor replacement, the technician will replace the sensor and take pictures of the old part both disassembled and out of the vehicle. These photos must be in focus and well-lit.
7. Parts Collection: Replaced parts may be requested by Audi of America (AoA) for further analysis.

This process emphasizes data collection to help Audi understand the root cause of the Audi A6 suspension malfunction C104807 and related issues.

Next Steps for Owners

If you own a 2021-2022 Audi A6, A7, S6, RS 6, RS 7, A6 allroad, or A7 PHEV and are experiencing a "suspension malfunction warning message" or suspect an issue with your vehicle's ride height, it is recommended to contact your authorized Audi dealer. Be prepared to describe the symptoms and any warning messages you've observed. Your dealer will follow the procedures outlined in TSB 41 21 00 2065161/1 to diagnose and address the issue.

NHTSA ID: 10203705