code 4121 sensor? or exhaust ecu? | FerrariChat
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code 4121 sensor? or exhaust ecu?

Discussion in '348/355' started by 348spyder, Jun 30, 2008.

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  1. 348spyder

    348spyder Rookie

    Apr 3, 2008
    3
    #1 348spyder, Jun 30, 2008
    im a mechanic but not a ferrari tech. i pulled code 4121 catalyzer temp. code from cylinders 1-4. i know its prolly gonna be a bad temp. sensor, exhaust ecu, or a bad cat. anyone seen this code and verified a fix?
     
  2. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,044
    USA
    #2 f355spider, Jun 30, 2008

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