2021-2022 Audi e-tron Suspension DTCs U12B800 P000000

Audi has issued Technical Service Bulletin (TSB) 2058686/2 to address specific diagnostic trouble codes (DTCs) that may be stored in the suspension control module (J775) of 2021-2022 Audi e-tron vehicles. This TSB supersedes a previous bulletin, 20-31, dated February 21, 2020, and provides updated guidance for technicians.

Symptoms

Owners of affected vehicles typically experience no noticeable symptoms or performance issues related to this condition. The TSB explicitly states, "No customer concerns, it is found during PDI or any other diagnostic work." This means that the presence of these DTCs is usually discovered during routine maintenance, pre-delivery inspection (PDI), or other diagnostic procedures, rather than due to a driver complaint.

Fault Codes / DTCs

Technicians may find one of the following diagnostic trouble codes stored in the suspension control module, J775 (address word 0074):

Code	Description	Symptom Code
U12B800	ABS control unit implausible - passive/sporadic	15417397
P000000	passive/sporadic	15417397

These codes are often recorded as "passive/sporadic," indicating that the condition was not continuously present.

Diagnosis / Trigger Conditions

These DTCs are typically identified during diagnostic scans performed by a workshop, such as during a pre-delivery inspection or other service appointments. The presence of these specific codes, U12B800 or P000000, in the suspension control module without any corresponding customer complaints is the primary trigger for this bulletin.

Important Warnings for Owners and Technicians

This TSB contains a critical instruction: if only DTC U12B800 or P000000 is stored in the suspension control module, and no other DTCs are present in other control modules, do not repair or replace any components. The TSB clarifies that these specific DTCs "have no affects on the system characteristics." The recommended action is simply to clear the DTCs and release the vehicle. If additional DTCs are present in the suspension control module, the technician should follow the standard test plan to resolve those specific issues.

This guidance is vital as it prevents unnecessary repairs, part replacements, and associated costs for a condition that does not impact vehicle operation or safety. If you are told your 2021-2022 Audi e-tron suspension DTC requires a part replacement for these codes alone, refer your service center to TSB 2058686/2.

Repair Procedure Summary

For the 2021-2022 Audi e-tron suspension DTCs U12B800 or P000000, the repair procedure is straightforward, provided no other DTCs are present:

1. Connect a diagnostic tool to the vehicle.
2. Read the fault memory of the suspension control module (J775) and other control modules.
3. If only DTC U12B800 or P000000 is found in the suspension control module, and no other DTCs are present in any other control modules, proceed to clear the stored DTCs.
4. Release the vehicle to the customer.

No physical repairs or part replacements are required for these specific codes under these conditions.

Warranty Information

This service bulletin outlines specific warranty claim types and conditions:

• Standard Warranty: Covered for up to 48 months or 50,000 miles, whichever comes first.
• Certified Pre-Owned (CPO) Vehicles: Covered under the G10 claim type, requiring verification of owner status.
• Out-of-Warranty Vehicles: If the vehicle is outside of any applicable warranty, this Technical Service Bulletin serves as informational guidance only, and any diagnostic work may be at the owner's expense.

Technicians should use Service Number 4316 and Damage Code 0040 for warranty claims. The diagnostic time is allocated as GFF (0150 0000), with a maximum of 20 Technical Units (TU). No allowance is provided for road tests before or after the service procedure.

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Source: NHTSA ID: 10199928