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P0446 Toyota

P0446 Toyota - EVAP System Vent Control Circuit

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P0446 Toyota Comments |  Add Comment
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
Help with Possible causes What does this mean?
Tech notes
There are factory service bulletin for the following Toyota models:

Toyota RAV4
Toyota Tercel
Toyota Paseo
Toyota Camry
Toyota Avalon
Toyota Tacoma
Toyota 4Runner
Toyota T-100
Toyota Factory Service Bulletin OBDII Code P0446

2003 – 2004 Toyota Corolla
2003 – 2005 Toyota Matrix
Toyota Factory Service Bulletin OBDII Code P0446 Corolla and Matrix

If P0446 is combine with P0440 and P0441 use this bulletin:
2000-2003 Toyota Solara
2000-2003 Toyota Avalon
2000-2003 Toyota Camry
2001-2003 Toyota Sienna
Toyota Factory Service Bulletin OBDII Code P0446 Solara, Avalon, Camry, Sienna

If only P0446 is present:
2001-2003 Toyota Sienna
Toyota Sienna Factory Service Bulletin OBDII Code P0446





User submitted video
Help with Tech Notes What does this mean?
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.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
P0446 Toyota 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 Toyota Information for specific Toyota models
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TOYOTA Technical Service Bulletins for P0446 code
2002 TOYOTA CAMRY Engine And Engine Cooling:engine Details
2003 TOYOTA CAMRY Engine And Engine Cooling:engine Details
2002 TOYOTA CAMRY 061000 Engine And Engine Cooling:engine Details
2003 TOYOTA CAMRY 061000 Engine And Engine Cooling:engine Details
2001 TOYOTA SIENNA Engine And Engine Cooling:engine Details
More Bulletins Help with Technical Service Bulletins What does this mean?
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