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EC-798 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] P0456 EVAP CONTROL SYSTEM OK >> GO TO 17. NG >> GO TO 15. 15. CHECK VACUUM HOSE Check vacuum hoses for clogging or disconnection. Refer to . OK or NG OK >> GO TO 16. NG >> Repair or reconnect the hose. 16. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE EC-763, "Component Inspection" OK or NG OK >> GO TO 17. NG >> Replace EVAP canister purge volume control solenoid valve. Refer to . 17. CHECK FUEL TANK TEMPERATURE SENSOR EC-717, "Component Inspection" OK or NG OK >> GO TO 18. NG >> Replace “fuel level sensor unit and fuel pump”. Refer to 18. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR EC-775, "Component Inspection" OK or NG OK >> GO TO 19. NG >> Replace EVAP control system pressure sensor. Refer to FL-16, "Removal and Installation" . 19. CHECK EVAP PURGE LINE Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. . OK or NG OK >> GO TO 20. NG >> Repair or reconnect the hose. 20. CLEAN EVAP PURGE LINE Clean EVAP purge line (pipe and rubber tube) using air blower. >> GO TO 21. 21. CHECK EVAP/ORVR LINE Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper connection. For location, refer to . OK or NG OK >> GO TO 22. NG >> Repair or replace hoses and tubes. 22. CHECK RECIRCULATION LINE Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and improper connection. OK >> GO TO 23. NG >> Repair or replace hose, tube or filler neck tube. 23. CHECK REFUELING EVAP VAPOR CUT VALVE EC-926, "Component Inspection" OK or NG OK >> GO TO 24. 2011 Pathfinder |