Audi U12B800
passive/sporadic) with symptom code 15417397. Or DTC P000000 (passive/sporadic) with symptom code 15417397. Technical Background Not applicable. Production Solution Not applicabl
Quick answer
For certain US Audi e-tron model years, U12B800 can be stored passively/sporadically in the suspension control module (J775, address 0074) with symptom code 15417397, including when there are no customer concerns. Audi’s cited bulletin directs a diagnostic check for additional DTCs in other control modules before proceeding; the supplied evidence does not establish driving, charging, or repair guidance.
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 U12B800 mean?
For certain US Audi e-tron model years, U12B800 can be stored passively/sporadically in the suspension control module (J775, address 0074) with symptom code 15417397, including when there are no customer concerns. Audi’s cited bulletin directs a diagnostic check for additional DTCs in other control modules before proceeding; the supplied evidence does not establish driving, charging, or repair guidance.
2. Technical explanation
Verified Audi/NHTSA bulletin evidence describes U12B800 as “ABS control unit implausible - passive/sporadic” when stored in suspension control module J775 (address word 0074), with symptom code 15417397. The same bulletin also identifies P000000, passive/sporadic, with that symptom code as an alternative workshop finding. Technical background and production solution are listed as not applicable in the supplied bulletin evidence.
3. What system is affected?
Suspension control module J775 (address word 0074). The DTC description references the ABS control unit.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Audi’s bulletin states that there may be no customer concerns.
- The code may be found during pre-delivery inspection (PDI) or other diagnostic work.
- A passive/sporadic U12B800 may be stored with symptom code 15417397.
6. Possible causes
- Not yet established by verified evidence. Audi’s supplied bulletin lists the technical background as not applicable.
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
- Have the vehicle evaluated using appropriate Audi diagnostic procedures if the DTC is present.
- Do not infer a charging or driving restriction from the supplied evidence alone.
10. Step-by-step troubleshooting
- Confirm whether U12B800 is stored in suspension control module J775 (address word 0074) with symptom code 15417397.
- Check whether further DTCs are present in other control modules, as specified in Audi’s bulletin evidence.
- The supplied evidence does not establish additional diagnostic steps for cases with other DTCs.
11. When to contact service
Audi service evaluation is appropriate if the code is present, particularly if additional DTCs are stored in other control modules. The supplied evidence does not establish whether service is mandatory in every case.
12. What the service center may check
- Read fault memory in suspension control module J775 (address word 0074).
- Determine whether U12B800 is passive/sporadic and associated with symptom code 15417397.
- Check for further DTCs in other control modules.
13. Possible repair or resolution
- Not yet established by verified evidence. The supplied bulletin evidence identifies technical background and production solution as not applicable.
14. Affected vehicles
- Audi e-tron · 2019–2023 · US
- Audi e-tron · 2019–2020 · US
- Audi e-tron · 2020–2022 · US
15. Related TSBs / service bulletins
- Audi Technical Service Bulletin A4322602058686_3, published June 9, 2022, documented by NHTSA as manufacturer communication MC-10214465-0001: https://static.nhtsa.gov/odi/tsbs/2022/MC-10214465-0001.pdf
- Audi Technical Service Bulletin A4321522058686_2, published August 2, 2021, documented by NHTSA as manufacturer communication MC-10199928-0001: https://static.nhtsa.gov/odi/tsbs/2021/MC-10199928-0001.pdf
- Audi Technical Service Bulletin A4320312058686_1, published February 21, 2020, documented by NHTSA as manufacturer communication MC-10171809-0001: https://static.nhtsa.gov/odi/tsbs/2020/MC-10171809-0001.pdf
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified source: Audi manufacturer communications published through NHTSA. The supplied applicability data covers US Audi e-tron vehicles for 2019–2023, with overlapping year ranges across bulletin revisions. The original cited bulletin identifies 2019–2020 Audi e-tron quattro.
19. Frequently asked questions
What does U12B800 mean in the supplied Audi evidence?
It is described as “ABS control unit implausible - passive/sporadic” when stored in suspension control module J775, address word 0074, with symptom code 15417397.
Will this code always cause a warning or customer complaint?
No. The supplied Audi bulletin states that there may be no customer concerns and that the code may be found during PDI or other diagnostic work.
Is U12B800 confirmed to prevent driving or charging?
Not yet established by verified evidence.
What should a technician check first?
The supplied bulletin evidence says to determine whether further DTCs are present in other control modules.