OBD-II Diagnostic Trouble Code
P0456
Evaporative Emission System Leak Detected Very Small Leak
P
Powertrain
engine / trans
engine / trans
0
Generic
SAE standard
SAE standard
4
Auxiliary emission controls
56
Evaporative Emission System Leak Detected Very Small Leak
Severity · general guide
Moderate
Fix soon — usually won't strand you
Code type
Jeep
System
Powertrain
Model
Grand Cherokee
Years
2011