Audi U110100
This DTC neither causes any problems with the functionality of the vehicle nor any warning messages visible
Quick answer
For the Audi applications covered by the verified bulletin, U110100 may be an erroneously stored “ghost DTC” in the driver-assistance systems control module. Audi states that it does not cause functional problems or visible warning messages, and repairs should not be performed for that concern.
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 U110100 mean?
For the Audi applications covered by the verified bulletin, U110100 may be an erroneously stored “ghost DTC” in the driver-assistance systems control module. Audi states that it does not cause functional problems or visible warning messages, and repairs should not be performed for that concern.
2. Technical explanation
Verified Audi bulletin evidence identifies U110100 as erroneously stored in driver assistance systems control module J1121 (address word 00A5). The bulletin calls it a ghost DTC, states the condition is normal, and says the code neither causes vehicle-function problems nor visible warning messages. Separate verified evidence also identifies U110100 as “Component protection active” in the night-vision-system control module J853 (address word 0084), where a night-vision fault message and inoperative night vision were reported. The supplied evidence therefore shows that interpretation depends on the control module and vehicle condition.
3. What system is affected?
Driver assistance systems control module J1121 (address word 00A5) in the ghost-DTC bulletin. Night vision system control module J853 (address word 0084) in the separate night-vision bulletin.
4. How serious is this code?
Not yet established by verified evidence. For the verified driver-assistance ghost-DTC condition, Audi states there are no functional problems or visible warning messages.
5. Symptoms you may notice
- For the verified driver-assistance ghost-DTC condition: no vehicle-function problems and no visible warning messages.
- For the separate verified night-vision condition: “Night vision assist: fault. Please contact service” may appear in the instrument cluster, and the night vision system may not work.
6. Possible causes
- In the driver-assistance bulletin, U110100 is described as erroneously stored (a ghost DTC); Audi states this condition is normal.
- In the night-vision bulletin, Audi states that a diagnostic feature is too sensitive and identifies U110100 as “Component protection active.”
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
- Confirm which control module stored U110100 and whether any warning message or function loss is present.
- For the verified driver-assistance ghost-DTC condition, follow Audi’s direction not to perform repairs or replace parts for this concern.
- If the Night vision assist fault message is present or night vision does not operate, contact Audi service.
10. Step-by-step troubleshooting
- Check whether U110100 is stored in J1121 (driver assistance systems control module, address word 00A5) or J853 (night vision system control module, address word 0084).
- For the verified night-vision condition, Audi’s documented service step is to clear the vehicle DTCs.
- No further diagnostic procedure is established by the supplied verified evidence.
11. When to contact service
Contact Audi service if the Night vision assist fault message is displayed or the night vision system does not work. For U110100 stored as the verified J1121 ghost DTC without functional problems or visible warnings, Audi states that no repair should be performed.
12. What the service center may check
- Identify the module reporting U110100.
- For J1121, confirm whether the condition matches Audi’s documented ghost-DTC condition.
- For J853, check for the documented night-vision warning message and night-vision function loss.
- For the documented J853 condition, clear the vehicle DTCs as specified by Audi.
13. Possible repair or resolution
- For the verified J1121 ghost-DTC condition, Audi directs: do not perform repairs or part replacements; the condition is normal.
- For the verified J853 night-vision condition, Audi stated that a solution was under development and that the bulletin would be updated when more information became available.
14. Affected vehicles
- Audi A7 · 2019–2021 · US
- Audi A8 · 2019–2020 · US
- Audi A8 · 2019–2021 · US
- Audi e-tron · 2019–2020 · US
- Audi e-tron · 2019–2021 · US
15. Related TSBs / service bulletins
- Audi/NHTSA manufacturer communication A9021952062601_1, published March 8, 2021: U110100 may be stored erroneously in J1121 as a ghost DTC. Audi says not to perform repairs or part replacements and states there are no functional problems or visible warnings.
- Audi/NHTSA manufacturer communication A9021042063262_1, published May 14, 2021: U110100 may be stored in J853 with a night-vision fault message and inoperative night vision. Audi attributes the condition to an overly sensitive diagnostic feature and specifies clearing vehicle DTCs.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified official NHTSA-hosted Audi communications: https://static.nhtsa.gov/odi/tsbs/2021/MC-10188601-0001.pdf and https://static.nhtsa.gov/odi/tsbs/2021/MC-10193596-0001.pdf
19. Frequently asked questions
Does U110100 always mean a vehicle fault?
No. In the verified Audi J1121 driver-assistance bulletin, it is described as an erroneously stored ghost DTC and a normal condition. A separate Audi bulletin documents U110100 in the J853 night-vision control module alongside a night-vision warning and loss of night-vision operation.
Should parts be replaced for U110100 in the driver-assistance control module?
No. For the verified J1121 ghost-DTC condition, Audi explicitly says not to perform repairs and notes that repairs or part replacements for this concern may be denied.
Which Audi vehicles are covered by the supplied applicability evidence?
US-market Audi A7 model years 2019–2021, A8 model years 2019–2021, and e-tron model years 2019–2021. The supplied evidence also contains overlapping A8 and e-tron entries limited to model years 2019–2020.