Possible Causes
WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Malfunction is detected when EVAP control system has a very small leak or does not operate properly. Possible causes are:
- Incorrect fuel tank vacuum relief valve.
- Incorrect fuel filler cap.
- Fuel filler cap remains open or fails to close.
- Foreign matter in fuel filler cap.
- Leak in hose between intake manifold and EVAP Canister Purge Volume Control Solenoid Valve (EVAP-CPVCSV).
- Foreign matter in EVAP Canister Vent Control Valve (EVAP-CVCV).
- Leak in EVAP canister or fuel tank.
- Leak or blockage in EVAP purge line.
- Leak or blockage in hose to EVAP Control System Pressure Sensor (EVAP-CSPS).
- Defective EVAP-CVCV or circuit.
- Defective EVAP-CPVCSV or circuit.
- Defective absolute pressure sensor (on 3.5L).
- Defective fuel tank temperature sensor.
- Missing or damaged EVAP-CVCV "O" ring.
- Defective EVAP-CSPS.
- Defective fuel level sensor or circuit.
- EVAP canister saturated with water.
- Defective water separator.
- Defective refueling control valve.
- Leak in On-Board Refueling Vapor Recovery (ORVR) system.