Welcome to Our Community

Wanting to join the rest of our members? Feel free to sign up today.

Sign Up

I just got a Prius, and now 2 error codes P0441 P0455...

Discussion in 'Gen II Prius Care, Maintenance and Troubleshooting' started by danbirch, Apr 18, 2010.

Social Buttons

  1. danbirch

    danbirch Junior Member

    Joined:
    Apr 17, 2010
    Messages:
    17
    Likes Received:
    0
    Location:
    Canyon Lake, California
    Your Vehicle Year:
    2014 Prius
    Model:
    Two
    Hi, I just got an 08 Prius (50k mi), and on the 2nd day of ownership, I got the check engine light:mad:. I am hoping that the codes are just from making the mistake of filling it up with Premium Gas, but the error codes say:

    P0441
    Evaporative Emission System Incorrect Purge Flow
    P0455
    Evaporative Emission System Leak Detected (gross leak/no flow)

    The car has no smell of gas fumes, gets about 50 mpg, and looks very clean under the hood (like new), runs very smooth. I just changed the gas cap, and am hoping that after the gas goes down, I'll add the 87 octane gas, and maybe I won't see the check engine light.

    Any ideas what those codes usually reflect? THANKS!
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    Messages:
    12,907
    Likes Received:
    3,070
    Location:
    Green Valley, AZ
    Your Vehicle Year:
    2007 Prius
    Model:
    N/A
    Congratulations on your new acquisition.

    Did you replace the gas cap with the correct Toyota part? The cap needs to be tightened to at least one click.

    Both diagnostic trouble codes reflect a problem with the fuel tank emissions control. DTC P0441 and P0455 can be caused by the following long list of potential issues:

    Fuel tank cap is incorrectly installed

    Fuel tank cap is cracked or damaged

    Vacuum hose cracks is blocked, damaged or disconnected
    Open or short in vapor pressure sensor circuit

    Vapor pressure sensor

    Open or short in EVAP VSV circuit

    EVAP VSV

    Open or short in CCV circuit

    CCV

    Open or short in VSV for purge flow switching valve circuit

    VSV for purge flow switching valve

    Fuel tank is cracked, or damaged

    Charcoal canister is cracked, or damaged

    Fuel tank over fill check valve is cracked or damaged

    ECM
  3. danbirch

    danbirch Junior Member

    Joined:
    Apr 17, 2010
    Messages:
    17
    Likes Received:
    0
    Location:
    Canyon Lake, California
    Your Vehicle Year:
    2014 Prius
    Model:
    Two
    Thank you very much for your response, Patrick. I got the gas cap at AutoZone...so far so good. I have waited a long time to get a Prius, and am excited to get past this error code.

    I'll post back any updates if the light goes on again. THANKS!
  4. cfhebert

    cfhebert New Member

    Joined:
    May 6, 2010
    Messages:
    1
    Likes Received:
    0
    Location:
    Toronto
    Your Vehicle Year:
    2007 Prius
    Model:
    N/A
    Hi, we are in ther same boat, wife recently bought an 07 Prius, 64k kms, 2nd day check engine light came on. Error code is P0456. The dealer tried to fix but the dreaded check engine light is back a week later.
    After investigating the car's repair history we are finding out this code has been persistent for about a year now, all major EVAP parts have been replaced including the entire gas tank 3 times!!!
    I don't think Toyota has a good handle on these codes...which is probably why the car was traded in.

    I know this isn't much help but thought I would share. Tomorrow the car goes back to the dealer, I told the dealer to supply a replacement vehicle while the Prius is in for repairs. We like the Prius but the car's complexity is starting to scare me off.

    Claude in Toronto





  5. Rokeby

    Rokeby Member

    Joined:
    Jan 21, 2008
    Messages:
    3,006
    Likes Received:
    688
    Location:
    Ballamer, Merlin
    Your Vehicle Year:
    2008 Prius
    danbirch, cfhebert,

    The Prius' fuel and evap system is more complicated than most folks can
    imagine. Details here.

    FWIW, DTC P0441 is discussed on pg.14. DTC P0455 isn't mentioned.

    So, I'd go with what Patrick says. He's better than a pdf anyday. :rockon:
  6. kkka

    kkka New Member

    Joined:
    Feb 12, 2011
    Messages:
    1
    Likes Received:
    0
    Location:
    everett
    Your Vehicle Year:
    Other Non-Hybrid
    Model:
    N/A


    deos the same happen to 2005 kia sedana
  7. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    Messages:
    12,907
    Likes Received:
    3,070
    Location:
    Green Valley, AZ
    Your Vehicle Year:
    2007 Prius
    Model:
    N/A


    DTC P0441 and P0455 are generic codes, not manufacturer-specific. Hence the problem will be related to the emissions control system on the fuel tank.

    However this is not a Kia forum, and you'll probably receive better help if you ask your question at a forum that specializes in your brand. Good luck.
  8. wrxsubiemod

    wrxsubiemod port and polishing Specialist

    Joined:
    Feb 11, 2011
    Messages:
    36
    Likes Received:
    10
    Location:
    name where u like it
    Your Vehicle Year:
    2012 Prius v wagon
    Model:
    Two
    has the dealer performed a smoke test? a small pin hole in your evap system will throw this code. best way to find it is with a smoker... good luck
Similar Threads: Prius error
Forum Title Date
Gen III 2010+ Prius Care, Maintenance and Troubles 2010 Prius Map DVD Error While Driving Jul 19, 2014
Generation 1 Prius Discussion 'Disc Error' message in 2002 Prius. Causes and possible further complications? Jul 4, 2014
Gen II Prius Care, Maintenance and Troubleshooting Prius thought I had run out of gas, gave error codes P0A0F and P3191 Apr 1, 2014
Gen II Prius Care, Maintenance and Troubleshooting Error code POA80 - Hybrid Battery? 2006 Prius Dec 17, 2013
Gen II Prius Care, Maintenance and Troubleshooting HDD Error in Prius -2007 Oct 7, 2013