2022-2024 Audi e-tron GT U112300 Data Bus Error TSB

Symptoms of the Audi e-tron GT U112300 Data Bus Error

Owners of 2022-2024 Audi e-tron GT and RS e-tron GT models may encounter specific issues related to a data bus error, leading to significant operational problems. The primary symptom is an "An electrical system fault is shown in the instrument cluster." This warning indicates a malfunction within the vehicle's electrical architecture.

A critical consequence of this fault is that "The high-voltage system cannot be activated." This directly impacts the vehicle's ability to function, as it prevents both charging and driving. These problems can manifest as either intermittent occurrences or persistent conditions, severely affecting the vehicle's reliability and usability. The presence of the Audi e-tron GT U112300 data bus error can render the vehicle immobile.

Diagnostic Trouble Codes (DTCs)

Technicians investigating these symptoms will likely find specific diagnostic trouble codes stored in the vehicle's system. These codes pinpoint the nature of the electrical system malfunction.

The U112300 code is logged in the Data Bus OBD Interface (diagnostic address 0019) and may be associated with internal symptom codes such as 16711688, 16711779, 16711740, and 16711690. The B17D900 code, relating to the "Safety controller," might also be present in diagnostic address 008C.

Diagnosis and Technical Background

When an Audi e-tron GT exhibits these symptoms, workshop findings confirm that the high-voltage system remains inactive. This condition is observed even after the vehicle has undergone an extended bus sleep cycle, lasting at least 15 minutes. The core technical reason for the high-voltage system's inability to activate is a specific blockage within the gateway -J533-, which is located at diagnostic address 0019.

This critical blockage is directly attributed to the Hybrid Battery Management Control Module, identified as -J840- and found at diagnostic address 008C. The -J840- module interferes with the gateway's normal operation, preventing it from properly enabling the high-voltage system. This interference ultimately leads to the logging of diagnostic trouble code U112300 "Data bus error value received" and the associated operational issues.

Repair Procedure Summary

To address the Audi e-tron GT U112300 data bus error and associated high-voltage system issues, Audi recommends performing service campaign 91VT. This service campaign contains the necessary instructions and procedures for resolving the underlying problem. This TSB, 2071972/3, was last revised as Revision 3 with updated service and warranty instructions.

If the problem persists even after the service campaign 91VT has been completed, technicians should submit a Technical Assistance Center (TAC) ticket. They must provide the TSB number 2071972/3 in the Customer Concern field to help Audi's internal department quickly identify the connection to this specific bulletin.

Important Warnings for Owners

Owners of affected 2022-2024 Audi e-tron GT vehicles should be aware of a critical safety implication. If the high-voltage system cannot be activated, "The vehicle therefore cannot be charged or driven." This means the vehicle will be immobilized and unable to function as intended, requiring immediate attention.

NHTSA Source Citation

This information is based on NHTSA Manufacturer Communication 11015757.