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

Audi has released Technical Service Bulletin (TSB) 2062631/3 to address the issue of various Diagnostic Trouble Codes (DTCs) being erroneously stored in the high-voltage battery charger control module (J1050) of 2021-2023 Audi e-tron models. These are referred to as "ghost DTCs" because they do not indicate an actual fault or customer concern.

This TSB, issued on August 16, 2022, supersedes an earlier bulletin, Group 93 number 22-61, dated January 7, 2022. The primary purpose of this bulletin is to inform technicians that these specific DTCs, found during pre-delivery inspection (PDI) or other diagnostic work, should be disregarded.

Symptoms

Owners of affected Audi e-tron vehicles typically will not experience any noticeable symptoms related to these ghost DTCs. The codes are usually discovered during routine diagnostic scans or during PDI by service technicians, not due to a customer complaint.

Fault Codes / DTCs

The following DTCs may be stored in the high-voltage battery charger control module, J1050 (address word 00C6), depending on the software version installed. These are the Audi e-tron ghost DTCs that this bulletin addresses:

Vehicles with Software 0079 installed in J1050:

DTC	Designation	Symptom Code
B1A8AF0	Charge door 1 LIN actuator, path of movement fault	3211268
B194B13	Charge flap 2 search illumination – open circuit	3211295
B200000	Control module faulty	1049088
P0CA400	Hybrid/High voltage battery load voltage too high	14745862
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
U112100	Data bus missing message	13705477, 13705501, 13705524, 13705553, 13706243

Vehicles with Software 0081 installed in J1050:

DTC	Designation	Symptom Code	Static / Sporadic
P0CA400	Hybrid/High voltage battery load voltage too high	14745862	Both
U112100	Data bus missing message	13705524, 13705553, 13706243, 13705484	Both
U15B500	Quick battery charging (DC)	2097301	Sporadic
B200000	Control module faulty	1049088	Both
B194B13	Charge flap 2 search illumination Open circuit	3211295	Sporadic
B192E13	Charge flap 1 search illumination Open circuit	3211292	Both
U15BF00	Intelligent charging function Faulty communication	3276840, 3276846, 3276852	Both
P178E00	Function restriction due to excessive temperature	14750734	Sporadic
P33E300	Charging socket A Communication fault	2097664	Sporadic
P31D100	Charging socket A temperature sensor Electrical malfunction	14750742	Sporadic
U15C900	Security module (FuSi) function intervention	13709330	Both
U15AC00	Signal damping log malfunction	3280913	Both
B1A8AF0	Charge door 1 LIN actuator, Path of movement fault	3211268	Both

Vehicles with Software 0088 installed in J1050:

DTC	Designation	Symptom Code	Static / Sporadic
P0D2800	Battery charger Primary voltage too high	14746125	Both
P33E500	Quick battery charging (DC) Charge station initialization error	2097287	Sporadic
U15AD00	Quick battery charging (DC) Charging station incompatible	2097292	Both
C116300	Development functions active	14753057	Both
P0CA400	Hybrid/High voltage battery load voltage too high	14745862	Both
U15B500	Quick battery charging (DC) Charging station not active	2097301	Both
B200000	Control module faulty	1049088, 3276816	Sporadic
U15BF00	Intelligent charging function Faulty communication	3276840	Both
U15AC00	Signal damping log Fault	3280899, 3280913	Both

Technical Background

The presence of these DTCs is attributed to a diagnosis issue within the software of the high-voltage battery charger control module, J1050. The module erroneously stores these codes, leading to their detection during diagnostic scans, even though no actual fault exists.

Important Warnings for Owners and Technicians

Audi explicitly states critical information regarding these Audi e-tron ghost DTCs:

• "The DTCs listed above stored in the high-voltage battery charger control module, J1050 (address word 00C6) are entered erroneously and can be ignored (so-called ghost DTCs)."
• "If there is a customer concern regarding charging, this TSB does not apply, and the vehicle must be repaired following Guided Fault Finding."
• "Do not perform any repairs. Any repairs or part replacements for this concern may be denied."
• "This condition is normal."

Owner Action

If your 2021-2023 Audi e-tron is diagnosed with any of the ghost DTCs listed above and you are not experiencing any actual charging problems, you should be aware that these codes are considered normal and do not require repair. Do not authorize any repairs or part replacements specifically for these codes if there are no other symptoms. If you are experiencing genuine charging issues, this TSB does not apply, and your vehicle should be diagnosed and repaired according to standard procedures.

Warranty Information

This Technical Service Bulletin is informational only and is not applicable to any Audi warranty claims. This means that any diagnostic work or repairs performed solely based on these ghost DTCs, without an underlying customer complaint, would not be covered under warranty.

---

Source: NHTSA ID 10217914