By the AutoDTCs Editorial Team·Researched against SAEJ2012 & factory service data — how we research this
OBD-II Diagnostic Trouble Code
U12DB
Engine control module (ECM) received malfunction value
U
Network
modules / CAN bus
modules / CAN bus
1
Mfr
manufacturer code
manufacturer code
2
Network subsystem
DB
Engine control module (ECM) received malfunction value
Severity · general guide
Moderate
Module communication fault
Code type
Generic
System
Network