2021-2023 Audi e-tron Ghost DTCs in HV Battery Charger

Symptoms

Owners of 2021-2023 Audi e-tron vehicles may find various Diagnostic Trouble Codes (DTCs) stored in the high-voltage battery charger control module, J1050 (address word 00C6). These codes are often discovered during Pre-Delivery Inspection (PDI) or other diagnostic work, even when there are no actual customer concerns regarding charging performance. These are known as Audi e-tron ghost DTCs.

Fault Codes / DTCs

This Technical Service Bulletin (TSB 2062631/4) identifies several DTCs that may be erroneously stored. These Audi e-tron ghost DTCs are categorized by the software version installed in the J1050 control module.

Vehicles with Software 0079 installed in J1050 (address word 00C6):

Diagnostic address	DTC	Designation	Symptom Code
00C6	B1A8AF0	Charge door 1 LIN actuator, path of movement fault	3211268

Vehicles with Software 0081 installed in J1050 (address word 00C6):

Diagnostic address	DTC	Designation	Symptom Code	Static / Sporadic
00C6	P0CA400	Hybrid/High voltage battery load voltage too high	14745862	Both
00C6	U112100	Data bus missing message	13705524, 13705553, 13706243, 13705484	Both

Other DTCs that may be stored in vehicles with Software 0081 include:

• B194B13: Charge flap 2 search illumination – open circuit (3211295)
• B200000: Control module faulty (1049088)
• P1A1500: Charging unit 2 function restriction (14746766)
• P31D100: Charge socket A temperature sensor electrical error (14750742)
• P33E300: Charge socket A, communication error (2097664)
• P178E00: Function restriction due to excessive temperature (14750734)
• U15AC00: Signal damping log malfunction (3280913)
• U15B500: Quick battery charging (DC) – Charging station not active (2097301)
• U15BF00: Intelligent charging function – faulty communication (3276840, 3276846, 3276852)
• U15C900: Safety module (FuSi) function intervention (13709330)

Vehicles with Software 0088 installed in J1050 (address word 00C6) or J1239 (address word 8113):

Diagnostic address	DTC	Designation	Symptom Code	Static / Sporadic
00C6 or 8113	P0D2800	Battery charger Primary voltage too high	14746125	Both
00C6 or 8113	P33E500	Quick battery charging (DC) Charge station initialization error	2097287	Sporadic
00C6 or 8113	U15AD00	Quick battery charging (DC) Charging station incompatible	2097292	Both
00C6 or 8113	C116300	Development functions active	14753057	Both
00C6 or 8113	P0CA400	Hybrid/High voltage battery load voltage too high	14745862	Both

Technical Background

The presence of these DTCs is due to a diagnosis issue within the software of the high-voltage battery charger control module, J1050 (address word 00C6). The system erroneously records these fault codes, even when no actual malfunction is present. This means these are Audi e-tron ghost DTCs that do not reflect a real problem with the vehicle's charging system.

Important Warnings

It is crucial for technicians and owners to understand that the DTCs listed in this bulletin are erroneous and should be ignored. This condition is considered normal.

• Do not perform any repairs. Any repairs or part replacements for this concern may be denied under warranty.
• This condition is normal and does not indicate a fault in the vehicle's charging system.

Owner Action

If you own a 2021-2023 Audi e-tron and these specific DTCs are found during a diagnostic scan, you should be aware that they are likely ghost codes and do not require any repair. However, if you experience actual customer concerns regarding your vehicle's charging performance, this TSB does not apply. In such cases, the vehicle must be repaired following standard Guided Fault Finding procedures to address the legitimate issue.

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Source: NHTSA ID 10237408