Possible causes

– Missing Fuel cap
– Incorrect fuel filler cap used
– Fuel filler cap remains open or fails to close
– Foreign matter caught in fuel filler cap
– Vent control valve harness is open or shorted
– Vent control valve circuit poor electrical connection
– Faulty vent control valve

When is the code detected?

The P0446 codes triggered when an improper voltage signal is sent to Engine Control Module (ECM) through EVAP canister vent control valve.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Possible a noticeable fuel odor caused by the release of fuel vapors

P0446 Description

The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.

P0446 Information for specific makes

P0446 CHEVROLET
P0446 GMC
P0446 TOYOTA
P0446 LEXUS
P0446 INFINITI
P0446 NISSAN
P0446 CHRYSLER
P0446 CADILLAC
P0446 JEEP
P0446 DODGE
P0446 FORD
P0446 HYUNDAI
P0446 ISUZU
P0446 KIA
P0446 MAZDA
P0446 MITSUBISHI
P0446 BUICK
P0446 PONTIAC
P0446 SATURN
P0446 SCION
P0446 1999 TOYOTA CAMRY