Part of the generic U1191 overview — this page covers the Jeep meaning specifically.
OBD-II Diagnostic Trouble Code
U1191
Lost Communication With Upper Switch Bank
U
Network
modules / CAN bus
modules / CAN bus
1
Mfr
manufacturer code
manufacturer code
1
Network subsystem
91
Lost Communication With Upper Switch Bank
Severity · general guide
Moderate
Module communication fault
Code type
Jeep
System
Network
Model
Grand Cherokee
Years
2011