2022-2024 Audi e-tron GT P0DAC00 Battery Fault TSB

Symptoms

Owners of 2022-2024 Audi e-tron GT and RS e-tron GT vehicles may encounter a specific issue after the 12V battery has been disconnected and reconnected during a repair. This condition leads to a fault entry in the vehicle's event memory.

The primary symptom is the logging of the diagnostic trouble code (DTC) P0DAC00, indicating a "Hybrid/HV battery cell controller 1 electrical fault (static/intermittent)". While diagnostic tools like ODIS might suggest replacing one or more high-voltage battery modules, this TSB clarifies that such replacements are unnecessary.

Fault Codes / DTCs

The following diagnostic trouble code (DTC) is associated with this issue:

Diagnosis / Trigger Conditions

This specific fault, the Audi e-tron GT P0DAC00, is triggered when the 12V battery is connected, causing a brief interruption in current flow. This interruption can cause Component Monitoring Checks (CMCs) to log errors in the self-test, even though the high-voltage battery modules are not actually defective.

The diagnostic system, ODIS, then incorrectly recommends replacing the modules based on these logged CMCs. This is an erroneous diagnosis, as the modules are not faulty.

Important Warnings for Owners

Audi Technical Service Bulletin 2074056/1 includes critical warnings for both owners and service technicians:

• Do Not Replace Parts: "There is no reason to replace parts or attempt repairs. Unjustified work/replacement parts will be charged back." This means that replacing high-voltage battery modules for this specific P0DAC00 fault is not required and will not be covered under warranty.
• Remote Access Required: "Please postpone all repairs and send a support request. To reset the event memory entry, we must access your vehicle remotely using an external program." This indicates that the fault cannot be cleared through standard diagnostic procedures and requires specialized remote intervention from Audi.

Repair Procedure Summary

To address the Audi e-tron GT P0DAC00 fault and prevent unnecessary high-voltage battery module replacement, Audi has outlined a specific procedure for service technicians. Technicians are instructed to create a Technical Assistance Center (TAC) ticket.

This ticket must clearly identify the issue using the workshop code "Energy, electrical system, data transfer → battery management → de-energization". Crucially, the subject of the TAC ticket must include the TSB number, 2074056/1, and the phrase "Remote session P0DAC00". This ensures that the support team understands the specific nature of the fault.

Audi's support team will then provide the necessary next steps, which involve remotely accessing the vehicle using an external program to reset the event memory entry. This remote intervention is the only approved method to resolve the P0DAC00 fault when it occurs under these conditions.

Owner Action

If your 2022-2024 Audi e-tron GT or RS e-tron GT displays the P0DAC00 fault code after a 12V battery service, it is important not to authorize any repairs involving the replacement of high-voltage battery modules.

Contact your authorized Audi dealership and inform them about Technical Service Bulletin 2074056/1. Explain that the issue is the "Hybrid/HV battery cell controller 1 electrical fault (static/intermittent)" (P0DAC00) and that the TSB specifies a remote session for resolution, not module replacement.

The dealership will need to follow Audi's procedure by opening a TAC ticket and requesting the remote session to clear the P0DAC00 fault code. This process ensures the issue is resolved correctly and prevents unnecessary costs.

This information is based on Audi Technical Service Bulletin 2074056/1, issued July 1, 2024, and documented under NHTSA ID 11005945.