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EC-254 < COMPONENT DIAGNOSIS > [VQ40DE] P0448 EVAP CANISTER VENT CONTROL VALVE DRAIN FILTER 1. Check visually for insect nests in the drain filter air inlet. 2. Check visually for cracks or flaws in the appearance. 3. Check visually for cracks or flaws in the hose. 4. Blow air into port A and check that it flows freely out of port B. 5. Block port B. 6. Blow air into port A and check that there is no leakage. 7. If NG, replace drain filter. PBIB3641E 2009 Pathfinder |