OBD-II Diagnostic Trouble Code
U0004
High Speed CAN Communication Bus (+) Low
U
Network
modules / CAN bus
modules / CAN bus
0
Generic
SAE standard
SAE standard
0
Network subsystem
04
High Speed CAN Communication Bus (+) Low
Severity · general guide
Moderate
Module communication fault
Code type
Generic
System
Network
Standard
ISO/SAE Controlled
Fault type
Communication Loss