Part of the generic U0122 overview — this page covers the Jeep meaning specifically.
OBD-II Diagnostic Trouble Code
U0122
Lost Communication With Vehicle Dynamics Control Module
U
Network
modules / CAN bus
modules / CAN bus
0
Generic
SAE standard
SAE standard
1
Network subsystem
22
Lost Communication With Vehicle Dynamics Control Module
Severity · general guide
Moderate
Module communication fault
Code type
Jeep
System
Network
Model
Grand Cherokee
Years
2011