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

Bulletin Information and Revision History

This Technical Service Bulletin (TSB) 93 22 61 2062631/2, issued on January 7, 2022, addresses various erroneous diagnostic trouble codes (DTCs) in the high-voltage battery charger control module (J1050) of specific Audi e-tron models. This bulletin supersedes the previous TSB Group 93 number 21-44, dated March 29, 2021, for reasons including updated model year coverage and additional DTCs.

The bulletin has undergone revisions:

• Revision 1 (March 29, 2021): Initial publication.
• Revision 2 (January 7, 2022): Revised the header to include additional model years and updated the condition description to include DTCs relevant to software levels 0081 and 0088.

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) during routine diagnostic checks or pre-delivery inspections (PDI). These are identified as "ghost DTCs" because they do not correspond to an actual vehicle malfunction or customer concern. The presence of these Audi e-tron ghost DTCs does not indicate a problem with the charging system or any related components. Importantly, there are "No customer concerns" associated with these codes; they are typically discovered during diagnostic work.

Fault Codes / DTCs

The following DTCs with symptom codes may be stored in the high-voltage battery charger control module, J1050 (address word 00C6), depending on the software version installed. These codes are erroneous and should be disregarded unless accompanied by an actual customer complaint related to charging. These are the Audi e-tron ghost DTCs that do not require repair.

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

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 (address word 00C6)

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

Vehicles with Software 0088 installed in J1050 (address word 00C6)

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

Technical Background

These Audi e-tron ghost DTCs are a result of a diagnosis issue within the software of the high-voltage battery charger control module, J1050 (address word 00C6). The software erroneously stores these codes even when no actual fault condition exists. This is a known condition and is considered normal vehicle operation. The bulletin explicitly states that these DTCs are "entered erroneously and can be ignored (so-called ghost DTCs)."

Important Warnings

Audi has issued specific instructions regarding these ghost DTCs to prevent unnecessary repairs and costs:

• "If there is a customer concern regarding charging, this TSB does not apply, and the vehicle must be repaired following Guided Fault Finding." This means if you are experiencing actual charging problems, a full diagnostic procedure is required, and these ghost DTCs should not be the focus.
• "Do not perform any repairs. Any repairs or part replacements for this concern may be denied." This is a crucial warning for both technicians and owners, emphasizing that no physical repair is needed for these specific codes.
• "This condition is normal." The presence of these codes alone does not indicate a fault.
• This Technical Service Bulletin (TSB 93 22 61 2062631/2) is "informational only and not applicable to any Audi Warranty." This implies that any diagnostic time or attempted repairs based solely on these ghost DTCs will not be covered under warranty.

Owner Action

If you own a 2021-2023 Audi e-tron and encounter any of the listed DTCs during a diagnostic scan, you should be aware that these are likely ghost codes. No repair is necessary for these specific codes if there are no actual charging-related symptoms or customer concerns. If you experience any real issues with charging your vehicle, such as the vehicle not charging or charging incorrectly, then a proper diagnostic procedure should be followed, as this TSB would not apply to an actual malfunction. Do not authorize any repairs or part replacements based solely on the presence of these Audi e-tron ghost DTCs.

Source: NHTSA ID 10207162