Error Code 1111 - Hot Wire Air Flow Meter ??? | FerrariChat

Error Code 1111 - Hot Wire Air Flow Meter ???

Discussion in '348/355' started by foxnick348, Aug 24, 2011.

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  1. foxnick348

    foxnick348 Karting

    Nov 22, 2007
    56
    Racine, Wisconsin
    Full Name:
    Nick Fox
    Hey Guys.

    Check engine light came on today Bank 1-4

    Checked the computer and I'm getting Error Code 1111 listed as "Hot Wire Air Flow Meter"

    Does anyone know what this means? searched the board but couldn't find anything.

    Is this a bad connection at the air flow meter or a Bad air flow meter?

    thanks,


    Nick
     
  2. mj_duell

    mj_duell Formula 3

    Nov 20, 2004
    1,421
    S. Glastonbury, CT.
    Full Name:
    Mike
    Check and clean the plugs to the maf-air meters. You might want to take off the air meters and clean them out with maf cleaner too. after that check your positive bullet connector under the air-box and the negative battery quick connect and make sure all the connections are very clean. Disconnect the battery to clear the error and then do a 10 minute relearn. If you still have the error and have any stumble or running issues my guess is bad meter. If it turns out to be a connection issue get yourself a gold connector kit from Helm's.

    --Mike
     
  3. mulo rampante

    mulo rampante Formula Junior

    May 31, 2011
    997
    Terra Incognita
    Full Name:
    Charles
    #3 mulo rampante, Aug 24, 2011
    Last edited: Aug 24, 2011
    I can't help you with the car specifically, but I know what a "hot wire anemometer" is. Very likely this is the principle your air flow meter works on.

    I suppose it could be the connector or the sensor itself, though these are pretty rugged things. I'd check the connector first.

    For what it's worth, a hot wire anemometer (or hot wire air flow meter) is a thin piece of wire that is placed in the air stream to be measured. A current is run through the wire, which heats it. Any airflow will cool the wire, which in turn changes the wire's resistance. This, in turn, changes the current flow, which is measured. There are other schemes where a power supply tries to hold the current constant, and the voltage needed to do this is measured as the resistance changes. But the basic principle involves a change in the wire's resistance with temperature, regardless of the quantity that's actually being measured.

    There might be a spec. for "cold" resistance, the voltage across it, or current draw that you could measure.

    (Just saw Mike's reply after I hit "submit"... definitely good advice there... )
     
  4. mj_duell

    mj_duell Formula 3

    Nov 20, 2004
    1,421
    S. Glastonbury, CT.
    Full Name:
    Mike
    What he said also. You can check it running, use both outside pins on the meter with the plug off. Should measure 384 ohms I believe as set by the factory.

    ---Mike
     

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