U173D00 on Volkswagen: Front sensor control module for driver assistance systems No communication on Ethernet data bus (Unauthorized)
Diagnostic trouble code U173D00 on Volkswagen vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does U173D00 mean?
U173D00 indicates: Front sensor control module for driver assistance systems No communication on Ethernet data bus (Unauthorized).
This relates to the Network / communication system.
Common causes of U173D00
Communication partner (front sensor control module for driver assistance systems) 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 cable continuity/integrity
Parts often involved in U173D00
Ethernet cable (shielded or unshielded)
Front sensor control module for driver assistance systems
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 U173D00 — 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
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U173D00 is a diagnostic trouble code: Front sensor control module for driver assistance systems No communication on Ethernet data bus (Unauthorized).
What are the common causes of U173D00 on a Volkswagen?
Common causes include: Communication partner (front sensor control module for driver assistance systems) 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 a Volkswagen with U173D00?
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 U173D00 on a Volkswagen?
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 U173D00 on your specific Volkswagen.