458: CEL with fault code P1115 “Engine Control System Failure Goto Dealer” | FerrariChat

458: CEL with fault code P1115 “Engine Control System Failure Goto Dealer”

Discussion in 'Technical Q&A' started by FerrariCognoscenti, Sep 20, 2022.

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  1. FerrariCognoscenti

    FerrariCognoscenti Formula 3

    Jan 19, 2021
    2,429
    East Coast
    #1 FerrariCognoscenti, Sep 20, 2022
    I am getting a CEL every time I start the car with the error “Engine Control System Failure Goto Dealer”. I tried all the battery reset procedures and have a relatively new Antigravity so I know it’s not a battery issue. I have a cheap $15 OBD reader and just scanned my OBD port and got back error code P1115. Searches on the internet for P1115 show “Intake Air Temperature 2 Circuit High Input”.

    Not sure what this is. Anyone that can offer advice on the P1115 error?

    What should I check?

    If it’s a bad sensor, how do I know that, and how do I know exactly what new sensor to buy? Is there a specific sensor that correlates to P1115?

    Any help is appreciated!
     
  2. wmuno

    wmuno Formula Junior
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    Dec 24, 2007
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    Wilmette, Illinois
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    Bill Muno
    #2 wmuno, Sep 20, 2022
    Ferrari might not use the generic fault codes. I found this reference:

    Ferrari 375 P1115 Code Meaning : P 1 1 1 5

    (P) OBD-II Diagnostic Powertrain Trouble Code For Engine
    (1) Fuel And Air Metering
    (1) Fuel Rail/System Pressure - Too High
    (1) Engine Shutoff Solenoid Malfunction
    (5) Crankshaft Position Sensor B Circuit Malfunction
     
  3. FerrariCognoscenti

    FerrariCognoscenti Formula 3

    Jan 19, 2021
    2,429
    East Coast
    #3 FerrariCognoscenti, Sep 20, 2022
    Ah, what’s the next step I should take?


    Sent from my iPhone using Tapatalk
     
  4. Island Guy

    Island Guy Karting

    Feb 20, 2020
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    Island Guy
    #4 Island Guy, Sep 20, 2022
    Rather than guess on a $250K car with a $15 code reader, taking it to a shop that is familar with these cars would be a great first step...and likely the least expensive. As to the code read, a P0xxx code is generic. Any P1xxx is manufacturer specific.
     
  5. wmuno

    wmuno Formula Junior
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    Dec 24, 2007
    434
    Wilmette, Illinois
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    Bill Muno
    #5 wmuno, Sep 20, 2022
    There is information in the Technical forum regarding problems with the crankshaft sensors. I agree you need to consult with an expert Italian car mechanic.
     
  6. Circle K

    Circle K Karting

    Dec 21, 2017
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    KC
    #6 Circle K, Sep 20, 2022
    If WMUNO is correct on the code, easy check before going to dealer. Get a fuel pressure gauge, connect to valve stem and see if pressure is correct(if no gauge, go to Oreilly/Autozone and use there’s(free)) if too high, replace fuel regulator, if good, then bring in for service
     
  7. FerrariCognoscenti

    FerrariCognoscenti Formula 3

    Jan 19, 2021
    2,429
    East Coast
    #7 FerrariCognoscenti, Sep 20, 2022
    Thank you very much! How do I know what is a normal fuel pressure reading?
     
  8. Circle K

    Circle K Karting

    Dec 21, 2017
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    KC
    #8 Circle K, Sep 21, 2022

    Sorry, that I don’t know. Also check the fuel pressure sensor
     
  9. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    38,085
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #9 tazandjan, Sep 21, 2022
    Careful with that. The 458 has a very high-pressure fuel system that I would not try to diagnose without the proper tools and knowledge.
     
    tbakowsky and 020147 like this.
  10. tbakowsky

    tbakowsky F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    19,388
    The Cold North
    Full Name:
    Tom
    #10 tbakowsky, Sep 23, 2022
    100% correct..do not be playing with a high pressure fuel system if you are not familure with it.

    If you want to see the pressures you can monitor with a scan tool.
     

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