How to clear code on 2.7 | FerrariChat

How to clear code on 2.7

Discussion in '348/355' started by F355Bob, May 31, 2017.

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  1. F355Bob

    F355Bob Formula 3

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    Madison, Wisconsin
    How do you clear a code on a 2.& F355. Mine is throwing a 4122 4121 and won't start
    I have my cat ecu's disconnected
     
    F355Bob, May 31, 2017
    #1
  2. Dave rocks

    Dave rocks F1 World Champ BANNED

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    Dave Lelonek
    Last edited by a moderator: Sep 7, 2017
    Dave rocks, May 31, 2017
    #2
  3. yelcab

    yelcab F1 World Champ Consultant

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    Mitchell Le
    Those two codes are: Cat temp ECU, and Cat temp too high. It is possible that those codes are inhibiting the ignition at the ECU. Just a guess though. You clear the codes by

    reading through all the codes
    at the end when the codes are long flashes indicating there is no more code to read
    You hold down the button for ten seconds.

    On the 355, if you disconnect the TCU, the input to the ECU goes to 5V which tells the ECU that the temp is too high. You may want to plug it back.
     
    yelcab, May 31, 2017
    #3
  4. F355Bob

    F355Bob Formula 3

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    It's weird because I ran without them plugged in for a few years with no problem. Capped off the bungs in the converter and car never ran as well. Problem with 355 is the shared spark makes a weak spark. If a plug fouls you loose two cylinders, raw fuel into the converter and it overheats. I had a ton of fuel removed in the lower rpms a few years ago when my computers were redone. Much better throttle and more lower end power. These cars, especially the 2.7 runs rich. Thinking of doing the MSD box with the coil in plug conversion for a better spark.
     
    F355Bob, May 31, 2017
    #4

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