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Check Fuel Filler Cap Design
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
  OK or NG
  1. OK: go to 2.
  2. NG: Replace with genuine NISSAN fuel filler cap.
Check Fuel Filler Cap Installation
Check that the cap is tightened properly by rotating the cap clockwise.

OK or NG
1. OK: go to 3.
2. NG:
  1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
  2. Retighten until ratcheting sound is heard.
Check Fuel Filler Cap Function
Check for air releasing sound while opening the fuel filler cap.

OK or NG
1. OK: go to 5 .
2. NG: go to 4.
Check Fuel Tank Vacuum Relief Valve
Refer to FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP) .

OK or NG
1. OK: go to 5.
2. NG: Replace fuel filler cap with a genuine one.
Install The Pressure Pump
To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely. For EVAP service port location, see Figure . For the location of EVAP service port, Refer to EVAPORATIVE EMISSION LINE DRAWING .

Fig 1: Installing Pressure To EVAP Service Port Adapter
Courtesy of NISSAN MOTOR CO., U.S.A.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Diagnostic Procedure