DTC P0456 Evaporative Emission Control System Leak Detected (Very Small Leak)
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For the diagnostic procedure, refer to DTC P0455. < refer to
DTC P0455 EVAPORATIVE EMISSION SYSTEM LEAK DETECTED (LARGE LEAK) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >