Nissan Pathfinder (2012 year). Instruction - part 338
P0448 EVAP CANISTER VENT CONTROL VALVE
EC-785
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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. Refer to