Question about 2001 Toyota Corolla

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P0440,p0441,p0446 if you have a code p0440,p0441,p0446 on a 2003 toyota corolla what will be the problem.

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  • Anonymous Feb 28, 2009

    am having the same codes .

    so P0446- Evaporative emissions system- Control valve circuit low is it
    VSV for Pressure
    Switching Valve ? Please help so i will change this part!

  • candy_one28 Mar 22, 2009

    I got the same codes on my camry, 440, 441 and 446
    The dealership found VSV and CCV faulty.....both were fixed but within a month, the codes came back on again. The codes still read 440, 441 and 446....What might be the issue?

  • Bunklash Apr 25, 2009

    All I need is the location of the charcoal cannister and pressure vent valve location...where on the car of an "04 Camry.

    Thanks in advance!

  • fsoetekouw May 16, 2009

    The dealership tells me that the Evac canister needs to be replaced. Is that correct. They charge $290 for the canister and $130 labor.

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These codes are all for the Evaporative Emissions System.

P0440- Evaporative emissions system fault- just saying there's something wrong with the system.

P0441- Evaporative emissions system- Incorrect purge flow- saying that the system isn't purging the raw fuel vapors (hydrocarbons- HC) as well as it should.

P0446- Evaporative emissions system- Control valve circuit low- there is a valve, usually located on the charcoal canister at the rear of the vehicle, that opens to allow fresh air to enter the evaporative emissions system as the engine vacuum purges the fuel vapors from the charcoal canister and closes when purge is not needed to prevent leakage of those fuel vapors to the atmosphere (HC is a greenhouse gas and is regulated as such by the fed gov't).

Given that you have the incorrect purge flow code and the control valve code together, my bet is that the vent control valve has failed (causing the P0446) and is not opening to allow fresh air into the system to displace the air from within the system that is being pulled to the engine. Since you have no fresh air entering the system, the engine will pull a vacuum on the system instead of the vapors "flowing" into the engine (causing the P0441).


I hope that this is helpful to you!!!


ASE Master Technician with L1 and X1 Certifications; Nissan Scope Technician; Chrysler Level 3 Silver Technician- 12+ years experience.


Posted on Nov 17, 2008

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I have 99 toyota corolla ,chek engine is on code po441 what can i do to fix

Posted on Oct 26, 2010

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Good comment...you know your stuff.....keep up the good helpful tips Master ....million thanks you for other users !

Posted on Mar 20, 2009

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