99 S80 Code P0442 Troubleshooting

Discussion in 'Volvo S80' started by Deacon Eisenhart, Oct 6, 2007.

  1. Getting a Code P0442. Also noticed since that I do not get the pressure
    release when I open the gas cap at the gas station anymore, it used to hiss
    pretty nicely.

    I checked the purge valve in the front of the car, did the old wrap my lips
    around it and couldn't blow through, then engergized it and it opened.

    I suspect something at the canister, but W.T.F. that doesn't look easy to
    reach at all!

    Hearing some techs saying that the leak detection pump may have failed, but
    I would say I have a leak someplace just because I do not have pressure
    anymore at the cap. I did also change the cap to see if that did anything
    and no dice.

    Anybody have a "troubleshooting" procedure for this like 1st check this,
    2nd check this, .... I have very little repair information available for
    this vehicle. I'd feel better if I had an agenda.

    Thanks !!!

    Deacon Eisenhart
     
    Deacon Eisenhart, Oct 6, 2007
    #1
  2. Deacon Eisenhart

    bretbodas Guest

    Deacon,

    According to the info I found on code P0442, it is a small leak in the
    evap system. I will address that type of fault.

    The purge valve will not cause this code and there is no leak
    detection pump on a 99 S80. It will normally set a "large leak" fault.

    A scanner is a great way to start to address these issues, but they
    are not always available.

    Next to that is a smoke machine that you use to fill the evap system
    and check for leaks, also not easily obtained.

    You can visually check the evap hoses and use a hand held vac. pump
    and check some of the lines and canister for leaks.

    The canister shut off valve can cause a slow leak. If you can get to
    it, you can energize it and check it for a leak like you did with the
    evap valve.

    I believe there was a software update for this year, don't know if it
    will address your problem though.

    If you live in the SF area, I can possibly give further assistance.

    Good Luck
     
    bretbodas, Oct 9, 2007
    #2
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