Audi U15C900
voltage battery charger control module, J1050 (address word 00C6). A revised software version is in development in which the above DTC will no lo
Quick answer
For certain 2021–2022 Audi e-tron vehicles in the US, DTC U15C900 is documented in an Audi manufacturer communication as “Safety module (FuSi) function intervention.” The communication identifies a diagnosis issue in software version 0079 of the high-voltage battery charger control module J1050, address word 00C6. A revised software version was stated to be in development.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does U15C900 mean?
For certain 2021–2022 Audi e-tron vehicles in the US, DTC U15C900 is documented in an Audi manufacturer communication as “Safety module (FuSi) function intervention.” The communication identifies a diagnosis issue in software version 0079 of the high-voltage battery charger control module J1050, address word 00C6. A revised software version was stated to be in development.
2. Technical explanation
Verified evidence identifies U15C900 as “Safety module (FuSi) function intervention.” Audi’s manufacturer communication attributes the diagnostic issue to software version 0079 in the high-voltage battery charger control module J1050 (address word 00C6). The supplied evidence states that revised software was in development, but does not establish the final software version, repair procedure, or outcome.
3. What system is affected?
High-voltage battery charger control module J1050, address word 00C6.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- A diagnosis issue in software version 0079 of the high-voltage battery charger control module J1050 is documented by the supplied official manufacturer communication.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage system repair or module programming yourself.
- Have an Audi service provider evaluate the vehicle if U15C900 is present.
10. Step-by-step troubleshooting
- Confirm the stored DTC is U15C900.
- Identify the software version of the high-voltage battery charger control module J1050 (address word 00C6) using appropriate Audi diagnostic procedures.
- Check the applicable Audi manufacturer communication for current service guidance.
11. When to contact service
Contact an Audi service provider for diagnosis and applicable software-related guidance for U15C900.
12. What the service center may check
- Verify U15C900 in the high-voltage battery charger control module J1050, address word 00C6.
- Determine whether software version 0079 is installed in J1050.
- Review the applicable Audi manufacturer communication and current service information.
13. Possible repair or resolution
- The supplied evidence states that a revised software version was in development.
- A completed repair, final software version, or confirmed resolution is not yet established by verified evidence.
14. Affected vehicles
- Audi e-tron · 2021–2022 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 10189600: A9321442062631_1, published March 29, 2021. It documents U15C900 and a diagnosis issue in software version 0079 of high-voltage battery charger control module J1050 (address word 00C6).
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA-hosted Audi manufacturer communication, MC-10189600-0001.pdf: https://static.nhtsa.gov/odi/tsbs/2021/MC-10189600-0001.pdf
19. Frequently asked questions
What does Audi DTC U15C900 mean?
The supplied official manufacturer communication identifies U15C900 as “Safety module (FuSi) function intervention.”
Which vehicles are supported by the supplied evidence?
The supplied applicability evidence covers 2021–2022 Audi e-tron vehicles in the US.
What module is involved?
The evidence identifies the high-voltage battery charger control module J1050, address word 00C6.
Is charging or driving safe with U15C900?
Not yet established by verified evidence.
Is there a confirmed repair?
The communication states that revised software was in development. A final repair procedure or confirmed resolution is not established by the supplied evidence.