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

Important Warning

Owners should be aware that if this condition occurs, the high-voltage system cannot be activated even after an extended bus sleep cycle (15 minutes). This means the vehicle cannot be charged or driven until the issue is resolved.

Symptoms

Owners of affected 2022-2024 Audi e-tron GT vehicles may observe several critical symptoms related to an electrical system malfunction. The most common indication is an electrical system fault shown in the instrument cluster. This warning light alerts the driver to a significant problem within the vehicle's electrical architecture.

Crucially, the high-voltage system cannot be activated. This directly impacts the vehicle's ability to operate, as the high-voltage system is essential for propulsion and charging in electric vehicles. Owners might also notice issues with the information, navigation, communication, and entertainment systems, manifesting as a malfunction display or vehicle electrical system malfunction indicator.

In severe cases, the vehicle may not be able to start or engage the engine operation, leading to a complete inability to drive the car. These symptoms collectively point to a fundamental communication breakdown within the vehicle's data bus system.

Fault Codes / DTCs

When diagnosing the issue, technicians may find the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's system:

Diagnostic Address	Diagnostic Trouble Code	Fault Symptom	Storage State
0019 - Data Bus OBD Interface	U112300	Data bus error value received	Intermittent
0019 - Data Bus OBD Interface	U112300	Data bus error value received	Static
008C	B17D900	Safety controller	Passive/Intermittent

The primary code, U112300: "Data bus error value received", indicates a communication problem on the vehicle's data bus. This can be either an intermittent or static fault. Additionally, B17D900: "Safety controller" may be logged, often alongside the U112300 code, further pointing to a critical system malfunction preventing safe operation.

Diagnosis / Trigger Conditions

The underlying cause of the Audi e-tron GT data bus error U112300 is a blockage in the high-voltage system activation. Specifically, the high-voltage system, which is managed by the gateway -J533- (diagnostic address 0019), is being blocked by the Hybrid Battery Management Control Module, -J840- (diagnostic address 008C). This communication conflict prevents the high-voltage system from coming online, leading to the observed symptoms and DTCs.

Repair Procedure Summary

To resolve the Audi e-tron GT data bus error U112300 and related high-voltage system activation issues, Audi has issued Technical Service Bulletin (TSB) 2071972/4. This TSB directs service technicians to perform service campaign 91VT. This campaign is designed to address the software or control unit logic that causes the Hybrid Battery Management Control Module to improperly block the high-voltage system's activation. The specific steps involved in service campaign 91VT would be detailed in the campaign instructions provided to authorized Audi service centers.

Owner Action

If you own a 2022-2024 Audi e-tron GT or RS e-tron GT and are experiencing an electrical system fault in your instrument cluster, an inability to activate the high-voltage system, or if your vehicle cannot be charged or driven, you should contact your authorized Audi dealer immediately. Referencing Technical Service Bulletin (TSB) 2071972/4 and service campaign 91VT will help the service department quickly identify the issue. This TSB was released on April 28, 2025, so dealers will have the most up-to-date information and procedures to address this specific problem. The repair will be performed under the terms of the service campaign.

Revision History

This Technical Service Bulletin has undergone several revisions:

• Revision 4: Issued with Revised Service (Updated Instructions).
• Revision 3: Dated February 20, 2025, included Revised Service and Warranty (Updated Instructions).
• Revision 1: Initial publication on January 12, 2024.

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Source: NHTSA ID: 11017675