P1448 NISSAN - EVAP Canister Vent Control Valve Open - Possible causes - EVAP canister vent control valve - EVAP canister is saturated with water - EVAP control system pressure sensor and the circuit - Blocked rubber tube to EVAP canister vent control valve - Water separator. Start by checking for damage EVAP canister or hoses. If no hoses are damage the EVAP canister vent control valve may have to be replaced.
>>>>>P0440 NISSAN - EVAP Control System Small Leak - Possible causes - Missing or loose fuel cap - Incorrect fuel filler cap used - Fuel filler cap remains open or fails to close - Foreign matter caught in fuel filler cap - EVAP canister or fuel tank leaks - EVAP system hose leaking - Fuel tank leaking
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