OBD-II Diagnostic Trouble Code
U0121
Lost communication with anti-lock brake module
U
Network
modules / CAN bus
modules / CAN bus
0
Generic
SAE standard
SAE standard
1
Network subsystem
21
Lost communication with anti-lock brake module
Severity · general guide
Moderate
Module communication fault
Code type
Ford
System
Network
Model
F-150
Years
2011