2021 Audi e-tron Charging Problems TSB 2061788/3

Owners of the 2021 Audi e-tron may encounter various issues related to both AC and DC charging, alongside several Diagnostic Trouble Codes (DTCs) stored in the vehicle's onboard charger control module. These Audi e-tron charging problems can manifest as charging interruptions, non-responsive charging flaps, or even auxiliary heating failures.

This Technical Service Bulletin (TSB) 2061788/3, which supersedes previous bulletin 21-45 dated March 29, 2021, outlines a software update for the onboard charger (OBC) as the primary solution to these concerns.

Symptoms

Owners might notice one or more of the following Audi e-tron charging problems:

• "On certain DC chargers, the DC charging is interrupted after 15 minutes or does not start at all."
• "DC charging at public charging stations does not work."
• "AC/DC charging is interrupted."
• "The function button for charging flap 1/2 is defective."
• "The charging flap cannot be opened."
• "The auxiliary heating was activated via app but the vehicle was not pre-heated."

Fault Codes / DTCs

When diagnosing these Audi e-tron charging problems, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the high-voltage battery charger control module (OBC), J1050 (address word 00C6):

Code	Description
B1A8604	Function button charge door 1 faulty
B1A8704	Function button charge door 2 faulty
U112100	Databus missing message
U13AE00	Active parking system control module
U15AB00	Fast battery charging (DC) Communication
P31CF00	Charge cover A recognition cover locking
P31E700	AC power supply cable Open circuit
U15AC00	Signal damping log Malfunction
P1A1500	Charging unit 2 Function restriction
U15B500	Fast battery charging (DC) Charging station
P0CA400	Hybrid/EV Battery Charging Voltage High
B191CF8	Charge door communication malfunction
C12BB00	Control motor
U15BF00	Intelligent charging function faulty communication
P33EB00	Battery management system check DTC memory

Technical Background

The underlying cause of these charging issues is often an interruption in communication between the charger and the vehicle, particularly with DC chargers. This can lead to temporary suspension of charging. Additionally, AC charging communication errors can occur, contributing to the overall Audi e-tron charging problems.

Repair Procedure Summary

The resolution for these charging issues involves updating the onboard charger (OBC) software. The general procedure is as follows:

1. A technician will first check the current software level of the high-voltage battery charger control module (OBC), J1050.
2. If the software level is identified as 0070, a software update is required.
3. The update process follows the instructions detailed in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
4. After the update, the technician will attempt to confirm if the customer's concern has been resolved. If the problem persists, further diagnostics will be performed using the latest ODIS version and Guided Fault Finding.
5. Specific test plans, such as those for the high-voltage battery charger (00C6) and resetting charging timers and profiles (C6), will be utilized.

Required Tools or Parts

To perform the software update and diagnostics, technicians will use specific equipment:

• Tool Number: VAS 6160/VAS 6150
• Tool Description: VAS tester with the current version of ODIS (Windows 10)

The updated software will change the onboard charger's software version from 0070 to 0079, with a new software part number of 5QE915684AT.

Warranty Information

This repair is covered under warranty for vehicles up to 48 months or 50,000 miles, whichever comes first. For Certified Pre-Owned (CPO) vehicles, coverage is under G10, requiring owner verification. If your vehicle is outside of these warranty parameters, this Technical Service Bulletin serves as informational guidance only, and any repairs would likely be at the owner's expense.

Important Warnings

• If your vehicle is outside any warranty, this Technical Service Bulletin is informational only. Owners should be aware of potential costs for diagnosis and repair if not covered by warranty.

Next Steps for Owners

If you are experiencing any of the described Audi e-tron charging problems or suspect your vehicle may be affected, it is recommended to schedule an appointment with an authorized Audi service center. They can diagnose the issue, check your vehicle's software version, and perform the necessary onboard charger software update.

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NHTSA ID: 10191572