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Infiniti
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2004
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Q45
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Repair and Diagnosis
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Engine Performance
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Engine Control System
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DTC P1456: EVAP Control System
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Diagnostic Procedure
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3. Check Fuel Filler Cap Function
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3. Check Fuel Filler Cap Function
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK: GO TO 5.
NG: GO TO 4.