U170E00 on Audi: Information Electronics Control Module 1 No communication on Ethernet data bus (Unauthorized)
Diagnostic trouble code U170E00 on Audi vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does U170E00 mean?
U170E00 indicates: Information Electronics Control Module 1 No communication on Ethernet data bus (Unauthorized).
This relates to the Network / communication system.
Common causes of U170E00
Communication partner (Information Electronics Control Module 1) is not responding on Ethernet data bus
Faulty voltage supply to the control module
Faulty Ethernet cable
What to check (live data)
Voltage supply to the control module
Ethernet data bus cable continuity/integrity
Parts often involved in U170E00
Ethernet cable
Information Electronics Control Module 1 (J794)
Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for U170E00 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
U170E00 is a diagnostic trouble code: Information Electronics Control Module 1 No communication on Ethernet data bus (Unauthorized).
What are the common causes of U170E00 on an Audi?
Common causes include: Communication partner (Information Electronics Control Module 1) is not responding on Ethernet data bus, Faulty voltage supply to the control module, Faulty Ethernet cable. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving an Audi with U170E00?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix U170E00 on an Audi?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for U170E00 on your specific Audi.