codes p043f and p2401

lovesglass54lovesglass54 Member Posts: 1
edited October 2017 in Toyota
anyone having these codes when doing diagnostics? Replaced the purge clinoid, but didn't fix. Hope it's nothing to expensive or complicated. Let me know if you have had this and fixed or can help.


  • PF_FlyerPF_Flyer Pennsylvania Furnace, PAMember Posts: 9,400
    They’re both EVAP system codes. The EVAP system captures fumes from your gas tank before they escape into the atmosphere. There are a number of components that could be causing the codes.From

    OBD-II Code P043F is defined as a Evaporative Emission System Leak Detection Reference Orifice

    The Leak Detection Pump contains a reference orifice tube. This tube restricts airflow to create a difference of pressure in the EVAP system. If the Orifice tube becomes clogged with debris, the engine computer (PCM) will set code P043F. The orifice tube is replaced as a unit with the leak detection pump module/assembly.

    OBD-II Code P2401 is defined as a Evaporative Emission System Leak Detection Pump Control Circuit

    The Leak Detection Pump is part of the Evaporative Emissions System. After the vehicle has been sitting for a few hours, this pump will turn on and create a vacuum in the EVAP system. The engine computer (PCM) runs this test when the vehicle is off. If the PCM does not see the Leak Detection Pump activate as requested, or does not see a vacuum created in the EVAP System, the PCM will set code P2401.

    So you see it could could already be one of two items. Perhaps one situation caused the computer the throw the other code as well. Perhaps something else in the EVAP system caused the condition. Won't know until it's looked at

  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaMember Posts: 64,482
    THIS DISCUSSION might be of help to you.
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