Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Procedure
- Check Fuel Filler Cap Design
- Turn ignition switch OFF.
- Check for genuine NISSAN fuel filler cap design.
OK or NG
- OK: go to 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
- OK: go to 3.
- NG:
- Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
- 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
- OK: go to 5 .
- 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
- OK: go to 5.
- 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 .
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.