DTC P0440: EVAP Control System (Small Leak - Negative Pressure) Or DTC P1440: EVAP Control System (Small Leak - Positive Pressure): Notes
WARNING: This page is about a different car, the 2002 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
DO NOT apply excessive pressure or vacuum to evaporative system.
NOTE:
If DTC P1448 is also present, perform diagnosis for DTC P1448 first. See DTC P1448: EVAP CANISTER VENT CONTROL VALVE .
NOTE:
Before performing diagnostic procedure, follow testing procedure. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM.