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P0455 EVAP CONTROL SYSTEM EC-837 < COMPONENT DIAGNOSIS > [QR25DE EXCEPT FOR CALIFORNIA] C D E F G H I J K L M A EC N P O 2. Check for genuine NISSAN fuel filler cap design. YES >> GO TO 2. NO >> Replace with genuine NISSAN fuel filler cap. 2. CHECK FUEL FILLER CAP INSTALLATION Check that the cap is tightened properly by rotating the cap clockwise. YES >> GO TO 3. NO >> Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Then retighten until ratcheting sound is heard. 3. CHECK FUEL FILLER CAP FUNCTION Check for air releasing sound while opening the fuel filler cap. YES >> GO TO 5. NO >> GO TO 4. 4. CHECK FUEL TANK VACUUM RELIEF VALVE EC-839, "Component Inspection" Is the inspection result normal? YES >> GO TO 5. NO >> Replace fuel filler cap with a genuine one. 5. CHECK EVAP PURGE LINE Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or disconnection. . Is the inspection result normal? YES >> GO TO 6. NO >> Repair or reconnect the hose. 6. CLEAN EVAP PURGE LINE Clean EVAP purge line (pipe and rubber tube) using air blower. >> GO TO 7. 7. CHECK EVAP CANISTER VENT CONTROL VALVE Check the following. • EVAP canister vent control valve is installed properly. . • EVAP canister vent control valve. EC-816, "Component Inspection" . Is the inspection result normal? YES >> GO TO 8. NO >> Repair or replace EVAP canister vent control valve and O-ring. 8. CHECK FOR EVAP LEAK . Is there any leak in EVAP line? SEF915U |