Audi U014600
Lost Communication With Gateway A, active/static (symptom: 19870) Brake Electronics Control Module, J104 (address word 0003): • U044700: Diagnostic interface for data bus module 1,
Quick answer
U014600 is documented for the 2022–2023 US Audi Q4 e-tron as “Lost Communication With Gateway A,” stored active/static with symptom 19870. The supplied official manufacturer communication associates it with a no-communication condition involving several diagnostic addresses and additional gateway-related implausible-signal faults.
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 U014600 mean?
U014600 is documented for the 2022–2023 US Audi Q4 e-tron as “Lost Communication With Gateway A,” stored active/static with symptom 19870. The supplied official manufacturer communication associates it with a no-communication condition involving several diagnostic addresses and additional gateway-related implausible-signal faults.
2. Technical explanation
Verified evidence identifies U014600 in the Engine Electronics Control Module, J623 (address word 0001), as “Lost Communication With Gateway A, active/static (symptom: 19870).” The same manufacturer communication describes workshop findings of no communication with Application Server 1 System 1 Adaptive (8123), Application Server 1 System 2 Java (8124), Software Cluster Embedded 1 (C002), and Software Cluster Housekeeping 1 (C003). It also lists U044700, “Diagnostic interface for data bus module 1, implausible signal,” in the Brake Electronics Control Module, J104 (0003), and Brake Boost Control Module, J539 (0023).
3. What system is affected?
Gateway/data-bus communication. Verified module references include Engine Electronics Control Module J623, Brake Electronics Control Module J104, and Brake Boost Control Module J539.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- No communication with diagnostic address 8123: Application Server 1 System 1 Adaptive.
- No communication with diagnostic address 8124: Application Server 1 System 2 Java.
- No communication with diagnostic address C002: Software Cluster Embedded 1.
- No communication with diagnostic address C003: Software Cluster Housekeeping 1.
- U014600 may be stored active/static in Engine Electronics Control Module J623.
- U044700 may be stored active/static in Brake Electronics Control Module J104 and Brake Boost Control Module J539.
6. Possible causes
- Not yet established by verified evidence.
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 or module repair based on this code alone.
- Have the vehicle assessed with appropriate Audi diagnostic equipment, particularly if the listed no-communication findings or active/static DTCs are present.
10. Step-by-step troubleshooting
- Verify whether U014600 is stored in Engine Electronics Control Module J623 (address word 0001).
- Check for the documented no-communication findings at addresses 8123, 8124, C002, and C003.
- Check whether U044700 is stored in Brake Electronics Control Module J104 (0003) and Brake Boost Control Module J539 (0023).
- Further diagnostic procedure is not established by the supplied verified evidence.
11. When to contact service
Service need is not established by verified evidence. An Audi service provider can evaluate the documented communication faults using manufacturer diagnostic procedures.
12. What the service center may check
- Read fault memory from Engine Electronics Control Module J623, Brake Electronics Control Module J104, and Brake Boost Control Module J539.
- Confirm communication status for diagnostic addresses 8123, 8124, C002, and C003.
- Assess the documented U014600 and U044700 faults in the context of the manufacturer communication.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Audi Q4 e-tron · 2022–2023 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 10231572: A9123672069299_1, published February 2, 2023. The supplied evidence describes U014600 and related no-communication findings for the applicable vehicle population, but does not provide a verified repair resolution in the supplied excerpt.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10231572: A9123672069299_1 (Audi), https://static.nhtsa.gov/odi/tsbs/2023/MC-10231572-0001.pdf
19. Frequently asked questions
What does U014600 mean on an Audi Q4 e-tron?
Verified evidence defines it as “Lost Communication With Gateway A,” active/static with symptom 19870, in the Engine Electronics Control Module J623.
Which Q4 e-tron vehicles are covered by the supplied evidence?
The verified applicability record covers US-market Audi Q4 e-tron vehicles from model years 2022 through 2023.
Is it safe to drive or charge with U014600?
Not yet established by verified evidence.
What other faults are documented with U014600?
The supplied manufacturer communication also lists U044700, “Diagnostic interface for data bus module 1, implausible signal,” in brake-related control modules and documents no communication with addresses 8123, 8124, C002, and C003.