CAN Communication Bus Fault

Q: What does code U1000 mean?

CAN Communication Bus Fault: A general CAN communication bus fault has been detected. Common on Nissan and Hyundai vehicles as a catch-all communication code.

Network Code · High

What does U1000 mean?

A general CAN communication bus fault has been detected. Common on Nissan and Hyundai vehicles as a catch-all communication code.

System: Module Communication

U1000 is a network diagnostic trouble code indicating can communication bus fault. This code is classified as high severity, which means: address soon — may cause further damage.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.