U165500: Ethernet control module front sensors For Driver Assistance System no communication
Diagnostic trouble code U165500 — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does U165500 mean?
U165500 indicates: Ethernet control module front sensors For Driver Assistance System no communication.
This relates to the Network / communication system.
Common causes of U165500
No communication on Ethernet connection to the control module for front sensors (driver assistance system)
Interruption or fault in one of the 2 Ethernet cables connecting the front sensors control module to other control units
Loss of terminal 30 (power supply) or terminal 31 (ground) connection to the front sensors control module
What to check (live data)
Terminal 30 supply voltage at the front sensors control module
Terminal 31 ground continuity at the front sensors control module
Ethernet cable continuity/integrity (2 cables)
Parts often involved in U165500
Ethernet cables (2 cables connecting the front sensors control module)
Terminal 30 supply wiring
Terminal 31 ground wiring
Control module for front sensors (driver assistance system)
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 U165500 — 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.
U165500 is a diagnostic trouble code: Ethernet control module front sensors For Driver Assistance System no communication.
What are the common causes of U165500?
Common causes include: No communication on Ethernet connection to the control module for front sensors (driver assistance system), Interruption or fault in one of the 2 Ethernet cables connecting the front sensors control module to other control units, Loss of terminal 30 (power supply) or terminal 31 (ground) connection to the front sensors control module. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving with U165500?
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 U165500?
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 U165500 on your specific vehicle.