DTC P0456 Or DTC P1456: Notes

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Code Description

DTC P0456: EVAP Control System Very Small Leak (Negative Pressure Check)
DTC P1456: EVAP Control System Very Small Leak (Positive Pressure Check)

NOTE: If DTC P0442 or P1442 is also set, perform diagnosis for that code first.

NOTE: Before performing diagnostic procedure, follow testing procedure. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM.