2022 Audi e-tron GT Reduced Drive System Performance TSB

Audi has issued Technical Service Bulletin (TSB) 2067556/1, also identified as 93 22 77, to address instances of reduced drive system performance in 2022 Audi e-tron GT and RS e-tron GT models. This bulletin, released on July 27, 2022, outlines a software-related issue that can lead to various diagnostic trouble codes (DTCs) and affect vehicle operation.

Symptoms of Reduced Drive System Performance

Owners of affected 2022 Audi e-tron GT vehicles may experience a noticeable reduction in drive system performance. This often manifests as the vehicle entering "Limp Home Mode," where power output is limited to protect critical components. Typically, this issue is intermittent and resolves itself after the vehicle is restarted.

Diagnostic Trouble Codes (DTCs)

When diagnosing the 2022 Audi e-tron GT reduced drive system performance issue, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the Electric Drive Control Module (Power electronics Rear), J1235 (address word 0051), Electric Drive Control Module 2 (Power electronics Front), J1234 (address word 00CE), or the Engine Control Module (ECM), J623 (address word 0001):

DTC Code	Description	DFCC / Internal Code
P0A3C00	Drive Motor Inverter Over Temperature	44004
P072100	Output Shaft Speed Sensor Circuit Range/Performance	44271
P060A00	Internal Control Module Monitoring Processor Performance	44286 / 44285
P0A9300	Inverter Cooling System Performance	44088
P0C0100	Drive Motor Current High	44019
P215C00	Output Shaft Speed - Wheel Speed Correlation	44338
U011000	Lost Communication With Drive Motor Control Module "A"	21634
U041100	Invalid Data Received From Drive Motor Control Module "A"	21633
U178A00	E-Machine 2, fault freewheel	44081

Technical Background

The root cause of the 2022 Audi e-tron GT reduced drive system performance and associated DTCs is identified as a software issue within the vehicle's control modules. Audi has developed improved software to address this condition.

Important Owner Information

Owners should be aware of a critical precaution during the software update process. Audi states: "To prevent the high-voltage battery from charging during the software update, the high-voltage charging cable on vehicles with high-voltage components must be unplugged BEFORE the SVM code is entered. Charging the high-voltage battery during a software update can cause damage to the high-voltage components."

Repair Procedure Summary

The repair for the 2022 Audi e-tron GT reduced drive system performance involves performing a Software Version Management (SVM) update on the Electric Drive Control Unit (Power electronics Rear), J1235, and the Electric Drive 2 (Power electronics Front), J1234. Technicians must follow all instructions detailed in TSB 2011732: "00 Software Version Management (SVM), operating instructions," to ensure the update is performed correctly and safely. The specific SVM action code required for this update is 51A004.

Affected Control Units and Software Versions

The software update applies to the following control units and involves updating to the specified new software part numbers and versions:

Model	Control Unit Address	Old Software Part Number	Old Software Version	New Software Part Number	New Software Version (or higher)	SVM Code Input
e-tron GT	0051	9J1907121BA	0012	9J1907121BF	0013	51A004
RS e-tron GT		9J1907121BB	0012	9J1907121BE	0013
		9J1907121BC	0020	9J1907121BG	0021
		9J1907121BD	0020	9J1907121BH	0021
	00CE	9J1907124AH	0012	9J1907124AK	0013
		9J1907124AJ	0020	9J1907124AK	0021

Warranty Information

This software update is covered under warranty for up to 48 months or 50,000 miles, whichever comes first. For Certified Pre-Owned (CPO) vehicles, the claim type is G10, requiring verification of owner status. If the vehicle falls outside these warranty parameters, the Technical Service Bulletin 2067556/1 serves as informational guidance only. The Service Number for this procedure is 9350, with a Damage Code of 0040. Labor operations for the software update are coded as 0151 0000, with diagnostic road tests prior to and after the service procedure receiving no allowance.

Source: NHTSA ID 10216850