Part of the generic U1118 overview — this page covers the Jeep meaning specifically.
OBD-II Diagnostic Trouble Code
U1118
Lost Engine Message
U
Network
modules / CAN bus
modules / CAN bus
1
Mfr
manufacturer code
manufacturer code
1
Network subsystem
18
Lost Engine Message
Severity · general guide
Moderate
Module communication fault
Code type
Jeep
System
Network
Model
Grand Cherokee
Years
2011