Part of the generic P0118 overview — this page covers the Jeep meaning specifically.
OBD-II Diagnostic Trouble Code
P0118
Engine Coolant Temperature Circuit High
P
Powertrain
engine / trans
engine / trans
0
Generic
SAE standard
SAE standard
1
Fuel & air metering
18
Engine Coolant Temperature Circuit High
Severity · general guide
Moderate
Fix soon — usually won't strand you
Code type
Jeep
System
Powertrain
Model
Grand Cherokee
Years
2011