CEL - Environment Pressure Self-Learning | FerrariChat
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CEL - Environment Pressure Self-Learning

Discussion in '360/430' started by csteve, Jul 2, 2008.

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  1. csteve

    csteve Karting

    May 6, 2006
    172
    hong kong
    Full Name:
    steve chang
    #1 csteve, Jul 2, 2008
    has anyone ever had this CEL? Environment Pressure Self-Learning P1169. The dealer has never seen it.
     
  2. csteve

    csteve Karting

    May 6, 2006
    172
    hong kong
    Full Name:
    steve chang
    #2 csteve, Jul 7, 2009
    the same CEL - Environment Pressure Self-Learning came up when I start the car but went away in after 30min of driving. Anyone know what this Environment Pressure CEL is? F-service has no idea.
     
  3. adrenalater

    adrenalater Karting

    Dec 8, 2006
    126
    SF Bay Area
    Full Name:
    Jeff Stevens
    #3 adrenalater, Jul 7, 2009
    My best guess (get out your $.02) is that it relates to your MAP sensor (Manifold Absolute Pressure). In all the engine control schemes I'm aware of, the MAP sensor is read in the moments between key on and the engine running on its own. During that short time the MAP sensor will report ambient atmospheric pressure to the engine computer.

    The computer probably has an expected range of values for atmospheric pressure which it can use to decide if the sensor has gone wacky. If the sensor value does fall out of the expected range, the computer would set the code and illuminate the CEL.

    If the MAP sensor is failing, the computer will not have a handle on engine load, and will not be able to compensate for your elevation. Both of these will, in technical turns, screw up engine fueling.

    Jeff
     

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