Question about EVAP system (ODB message)

Discussion in 'General Motoring' started by ryan.g.williamson, Feb 26, 2006.

  1. I have a '99 Accord (4-cyl, 5-speed), and the "Check Engine Light" came
    on. I had Auto Zone use their ODB diagnostic machine, and got message
    "P1457," which, according to the Interweb means: "Leak Detected In EVAP
    Control System" The gentleman at Auto Zone said that usually just
    meant a loose or faulty gas cap. Can anybody confirm this? It's not
    that I don't trust the guy at Auto Zone, it's just... OK, that's
    exactly what it is.

    Also, is the remedy for this, assuming my gas cap is fine, to simply
    reset the light? How do I do that? I've heard different things from
    different people.

    Thanks in advance.
    ryan.g.williamson, Feb 26, 2006
  2. ryan.g.williamson

    Elle Guest

    Consider it confirmed. A loose (or more accurately, not properly tightened)
    gas cap will set off this CEL code. Very common. Other things can set it
    off, too, but this is one of the first you want to eliminate.

    Do you have an owner's manual? (I'm not trying to be smart. Some folks buy
    their Hondas used and don't get an owner's manual with it.) It should say
    how to reset the CEL, or if it does not, see .
    Elle, Feb 26, 2006
  3. ryan.g.williamson

    SoCalMike Guest

    yes, i can.
    at least ya arent payin for the advice.
    they shouldve reset the light for you. my scanner has a feature to clear
    the codes/reset the light.
    SoCalMike, Feb 27, 2006
  4. ------------------

    The manual says that three 'trips' will reset the light if it's caused
    by the gas cap (after you correct the fault). That means the engine has
    to heat up, then cool down three times.

    'Curly Q. Links', Feb 27, 2006
  5. ryan.g.williamson

    TeGGeR® Guest

    It's more than likely the gas cap.

    Three *complete* warm-ups and cooldowns will reset the light if the error
    does not recur.
    TeGGeR®, Feb 27, 2006
  6. Thanks for the tips. Does that mean that if the light doesn't turn off
    after three trips, it's a recurring problem?
    ryan.g.williamson, Feb 27, 2006
  7. ryan.g.williamson

    TeGGeR® Guest

    Then replace the gas cap.
    TeGGeR®, Feb 27, 2006
  8. ryan.g.williamson

    chip Guest

    there are two codes for evap leaks. they are P01456 and P01457. As a
    general rule the P01456 code covers from the fuel tank to the cap.
    The P01457 goes from the tank to the engine, in your case it may be
    an FTP sensor, two way valve, canister shut valve or purge control
    Good luck with that
    chip, Feb 28, 2006
  9. ryan.g.williamson

    TeGGeR® Guest

    Chip is right. My own FAQ even says so. I should have checked first before
    relying on my porous memory.

    This list:
    says the P1456/1457 are as follows:
    * P1456 Evaporative Emissions (EVAP) Control System Leakage
    (Fuel Tank System)
    * P1457 Evaporative Emissions (EVAP) Control System Leakage
    (EVAP Canister System)
    TeGGeR®, Feb 28, 2006
  10. Thanks for the clarification. I called the Honda dealer near me, and
    they said it could be a) the gas cap, b) the EVAP canisters c) gas
    spillage into the neck of the fuel system.

    He said to give it as many as 10-12 trips to see if it resets, and if
    not, then to look into it further.
    ryan.g.williamson, Feb 28, 2006
  11. ryan.g.williamson

    chip Guest

    Have someone actuate the 3 solenoids, the put a smoke machine on it
    and you'll find it.
    chip, Mar 1, 2006
  12. Man I wish I knew about cars so that would have made sense to me.
    Thanks for the tip though. (I don't usually make a point of my
    ignorance, but no sense hiding it.)
    ryan.g.williamson, Mar 1, 2006
  13. ryan.g.williamson

    TeGGeR® Guest

    I think he means that
    1) if all 3 solenoids are opened up at the same time (artifically
    2) and smoke is deliberately fed into the system under pressure,
    3) then where the smoke comes out of is where your leak is.
    TeGGeR®, Mar 1, 2006
  14. Well, this morning I just noticed that the light did not come on. It
    took a while, but the dealer said it could take 10-12 trips. Plus,
    most of those "trips" I made were very short, but this weekend I
    managed to actually drive on the highway, so that might've helped.

    Just thought I'd post in case anybody stumbles upon this topic sometime
    ryan.g.williamson, Mar 6, 2006
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