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DTC P0442: EVAP Control System: Notes

WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC P1448 is also set, 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.