DTC P0456: EVAP Control System Very Small Leak (Negative Pressure Check): Notes
WARNING: This page is about a different car, the 2002 Nissan Maxima and 2002 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before performing diagnostic procedure, follow testing procedure. See TESTING PROCEDURE
under SELF-DIAGNOSTIC SYSTEM.