1. Attachments are working again! Check out this thread for more details and to report any other bugs.

2007 P0446 and gas pump shuts off too early

Discussion in 'Gen 2 Prius Main Forum' started by repnatl, Feb 27, 2017.

  1. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    I have a 2007 prius and I've had the P0446 code since I bought it almost a year ago. Already tried two brand new gas caps from toyota. I just cleared it enough to pass emissions. But the past few fill ups the pump shuts off 3-4 gallons too early and I have to force the tank to full manually. No drive ability issues still averaging low to mid 40's mpg. Don't have access to a smoke machine for the evap condition but I'm very mechanically inclined. I have a decent harbor freight scanner. Don't wanna start throwing parts at it yet.

    Posted via the PriusChat mobile app.
     
  2. valde3

    valde3 Senior Member

    Joined:
    Jun 28, 2014
    2,002
    745
    0
    Location:
    Finland
    Vehicle:
    2004 Prius
  3. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,096
    4,795
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    It may be showing because the charcoal canister in the fume recovery circuit is contaminated by gas overflow. This is caused by constantly topping off the tank to get the last drop in the tank causing overflow of gas to get into that canister. or forcing gas into the tank by constantly clicking or holding causing sudden gas overflow.
    In the last 10 years we have seen very few issues with the gas tank other than the PITA bladder.
    Hundreds of threads about the bladder and not being able to fill the tank up or constantly shutting the pump off because of the bladder but other than that very few tank issues that threw codes other than the charcoal canister contamination.
    I'll try to find the a picture of the fume recovery circuit in the tank system. Its loony tunes looks like Nasa designed it. Lots of parts.
     
    #3 edthefox5, Feb 27, 2017
    Last edited: Feb 27, 2017
  4. jjmerp

    jjmerp Junior Member

    Joined:
    Oct 10, 2009
    49
    22
    0
    Location:
    Ohio
    Vehicle:
    2005 Prius
    Model:
    Four
    Last year my 2005 with 155K had P0446 changed cap stayed off for two months. checked hose clamps fell off replaced clamps good for another 2 months. Replaced Vapor Canister Purge Valve/Solenoid, 185k mo errors. You can remove valve and test with 9V bat should hear a click when power applied.
     
  5. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    Where is that purge valve located is it the one under the hood?

    Posted via the PriusChat mobile app.
     
  6. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    I was leaning towards that. The rectangular black box by the gas tank?

    Posted via the PriusChat mobile app.
     
  7. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    Is this the charcoal canister above the rear of the gas tank? Also is that the purge valve mentioned earlier that's in front of it?

    Posted via the PriusChat mobile app.
     

    Attached Files:

  8. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,096
    4,795
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    At the very least get a mini Vci at amazon for $25 and you'll be able to see what the car is unhappy about.
    May have more than one code or a code subset thrown and your not seeing it. The mini has techstream software and can pull all codes.
     
  9. jjmerp

    jjmerp Junior Member

    Joined:
    Oct 10, 2009
    49
    22
    0
    Location:
    Ohio
    Vehicle:
    2005 Prius
    Model:
    Four
    Yes the blue connector with the 3 hoses. Their should be clamps on the 3 hoses check both ends for clamps

    Posted via the PriusChat mobile app.
     
  10. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    All clamps rusted off lol (car came from new York owner. I'll throw some clamps on those first.

    Posted via the PriusChat mobile app.
     
  11. jjmerp

    jjmerp Junior Member

    Joined:
    Oct 10, 2009
    49
    22
    0
    Location:
    Ohio
    Vehicle:
    2005 Prius
    Model:
    Four
    Dealer wanted about $100.00 for valve got the canister from car-parts.com for $50.00 from a 2009 prius

    Posted via the PriusChat mobile app.
     
  12. jjmerp

    jjmerp Junior Member

    Joined:
    Oct 10, 2009
    49
    22
    0
    Location:
    Ohio
    Vehicle:
    2005 Prius
    Model:
    Four
  13. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    Gonna try there cause I'm seeing over $200 new for the canister

    Posted via the PriusChat mobile app.
     
  14. repnatl

    repnatl Junior Member

    Joined:
    Nov 4, 2016
    49
    23
    0
    Location:
    US
    Vehicle:
    2007 Prius
    Model:
    Two
    Replaced the charcoal canister and the purge valve from the junkyard check engine light has been off for 900 miles. The old canister smelled like straight up gas.

    Posted via the PriusChat mobile app.
     
    valde3 and bisco like this.
  15. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    well done, congrats!(y)
     
    repnatl likes this.
  16. trungdok

    trungdok Junior Member

    Joined:
    Sep 24, 2015
    45
    2
    0
    Location:
    Boston, MA
    Vehicle:
    2007 Prius
    Model:
    II
    could you do a little right up on how to do that? I have a similar issue - code P0446 and the tank would take no more than 6 gallons of gas even though it's empty (last gas indicator is blinking). Thank you.