2021 Audi A6 Software Update for DTC P0CA700, U046900
Audi has issued a manufacturer communication regarding a software update for certain 2021 A6, S6, S7, S8, and A7 models. This update addresses Diagnostic Trouble Codes P0CA700 or U046900, which indicate an issue within the vehicle's electrical system software.
También aplica a
- Audi A7
- 2021
- Audi S6
- 2021
- Audi S7
- 2021
- Audi S8
- 2021
Symptoms and Diagnostic Trouble Codes
Owners of affected 2021 Audi A6, S6, S7, S8, and A7 vehicles may encounter specific Diagnostic Trouble Codes (DTCs) related to the electrical system. These codes indicate a software-related issue that requires an update. The presence of these codes signals a need for service.
Affected Diagnostic Trouble Codes (DTCs)
The following DTCs are addressed by this manufacturer communication:
- P0CA700
- U046900
The Software Update
Audi has issued a software update to resolve the issues indicated by DTC P0CA700 or U046900. This update targets the electrical system software, ensuring proper functionality and preventing these fault codes from appearing. The 2021 Audi A6 manufacturer_communication specifies this as the necessary repair.
What Owners Should Do
If you own a 2021 Audi A6, S6, S7, S8, or A7 and have experienced issues related to the electrical system or have had these specific DTCs diagnosed, it is recommended to contact your authorized Audi dealership. They can confirm if your vehicle requires this software update and perform the necessary procedure. This update is typically covered under warranty as a manufacturer communication.
Important Note
This update differs from a recall. While it addresses a known issue, manufacturers often issue technical service bulletins (TSBs) or manufacturer communications for issues that do not pose an immediate safety risk but improve vehicle performance or reliability. Owners are not typically notified directly by mail for these types of communications.
Source: NHTSA ID: 10204723
Frequently Asked Questions
- What is DTC P0CA700 or U046900 in my 2021 Audi A6?
- DTC P0CA700 and U046900 are diagnostic trouble codes indicating a software-related issue within the electrical system of certain 2021 Audi models, including the A6.
- How do I get the software update for my Audi's electrical system?
- You should contact an authorized Audi dealership. They can diagnose your vehicle, confirm if the software update is needed, and perform the necessary procedure to resolve the DTC P0CA700 or U046900 issue.
- Is this software update considered a recall?
- No, this software update is issued as a manufacturer communication (similar to a Technical Service Bulletin or TSB) and is not a recall. While it addresses a known issue, it typically does not involve an immediate safety risk that would trigger a recall notification.
- Which Audi models are affected by this software update?
- This software update applies to 2021 Audi A6, S6, S7, S8, and A7 models.
Otras revisiones de este TSB
- 2024-2026 Audi Q8 48V Starter Generator DTCs P0A1A00 P19F800U046900
- 2024-2026 Audi 48V Starter Generator DTCs P0A1A00 P19F800U046900
- 2021-2023 Audi MHEV Electrical System Fault TSB 2073284/4U046900
- 2021-2023 Audi 48V Electrical System Warning U046900 TSBU046900
- 2024-2025 Audi Q7 Q8 Starter Generator DTCs P0A1A00 P19F800U046900
- 2024-2025 Audi Q7 / Q8 48V Starter Generator DTCs P0A1A00 P19F800U046900
- 2021-2023 Audi 48V Electrical System Malfunction TSB 2058831/15U046900
- 2019-2025 Audi MHEV Electrical System Fault TSBU046900
What Audi A6 owners report
Counted from the records in our database across 33 model years.
- 1,665
- Owner complaints
- 55
- Recalls
- 5,316
- Service bulletins
- 64
- Crashes reported
- 71
- Fires reported
- 65
- Injuries reported
The 2021 model year
18 complaints, the 24th most of 33 model years on file. Owners reported 0 crashes, 0 fires and 0 injuries for this year, which also has 11 recalls on file.
Electrical System, the system this article covers, accounts for 396 of 1,665 complaints (24%), including 11 for 2021.
Complaints by model year
| 1998 | 130 | |
|---|---|---|
| 1999 | 217 | |
| 2000 | 148 | |
| 2001 | 113 | |
| 2002 | 88 | |
| 2005 | 91 | |
| 2006 | 67 | |
| 2008 | 71 | |
| 2019 | 114 | |
| 2021 | 18 |
Most-reported systems
- Electrical System — 396
- Air Bags — 316
- Service Brakes — 161
- Fuel System — 150
- Engine — 130
Latest recalls for the 2021 model year
- 25V900000 — Back Over Prevention (Dec 2025)
- 25V201000 — Electrical System (Mar 2025)
- 23V601000 — Service Brakes, Hydraulic (Aug 2023)
Recent owner reports about electrical system
While operating the vehicle under normal driving conditions, the vehicle suffered an immediate, un-commanded loss of engine power and throttle response.
Read owner complaints →The vehicle went in for a software update. After purchasing the vehicle, the software update was part of a recall. Since that recall was performed, my vehicle has a lot of electronic glitches and a lot of issues.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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