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355 Check Engine Light

Discussion in '348/355' started by Enfield Joe, Jul 14, 2009.

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  1. Enfield Joe

    Enfield Joe Karting

    Oct 19, 2008
    223
    Connecticut
    Full Name:
    Joe
    #1 Enfield Joe, Jul 14, 2009
    I have a 1997 355 with 16,000 mile with a check engine light on. An independent Ferrari service got codes for Cats, & O2 sensors. One cat was bad so both were replaced with hyper-flo's. Engine light came on again. I then brought the car to an authorized Ferrari dealership. It was determined that only 3 of the 4 O2 sensors was functioning. Upon examining the faulty sensor, the tech noticed that the wire assembly which was meant to be connected to it was dangling. He connected the wire and re-tested. All 4 sensors were now working perfectly. An hour into my trip back home the engine light comes on again. I checked to made sure that the wire assembly that he connected was still in place, which it was. Any ideas????
     
  2. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,055
    USA
    #2 f355spider, Jul 14, 2009
    Buy a code scanner, so you can start scanning these yourself, and then post them here or give them to your technician.
     
  3. Enfield Joe

    Enfield Joe Karting

    Oct 19, 2008
    223
    Connecticut
    Full Name:
    Joe
    #3 Enfield Joe, Jul 14, 2009
    Thank you. I will. I'm sure it will pay for itself in spades.
     
  4. tcannon

    tcannon Formula 3

    Feb 18, 2009
    1,763
    Norman, OK
    Full Name:
    Todd Cannon
    #4 tcannon, Jul 14, 2009
    The code readers are very inexpensive these days. You can get them for less than $50 in places. Even though my 91 348 does not use one, the reader I bought has been very helpful for my other cars and the cars of my family and friends. It is nice to have the right tools for the job.
     
  5. UConn Husky

    UConn Husky F1 Rookie

    Nov 11, 2006
    4,425
    CT
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    Jay
    #5 UConn Husky, Jul 14, 2009
    Hey Joe you can borrow mine, will you be at Lime Rock this weekend for ALMS? If so I'll bring it -
     
  6. Enfield Joe

    Enfield Joe Karting

    Oct 19, 2008
    223
    Connecticut
    Full Name:
    Joe
    #6 Enfield Joe, Jul 15, 2009
    Jay, Check for a pm.
     
  7. eulk328

    eulk328 F1 Rookie

    Feb 18, 2005
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    F683
    #7 eulk328, Jul 19, 2009
    Do the standard code readers work on the 355? I thought there was a special Ferrari scan tool or is that for something else like to make actual adjustments to systems along with reading codes??


     
  8. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,055
    USA
    #8 f355spider, Jul 21, 2009
    Last edited by a moderator: Sep 7, 2017
    You can read the P-codes, and most of the sensor data...some will also allow you to graph the O2 sensor voltages. The Ferrari specifc products like SD-1 and SD-2 are needed for coding and resetting some things like the spider top mechanism, F-1 clutch engagement, etc.

    But a standard OBDII compliant tool is invaluable for everyday stuff. Warning...unless you have had the update/campaign/recall performed on your car, you may not be able to read the codes with a standard OBDII scan tool. Ferrari skipped a needed ground wire in the OBDII plug on purpose. ;) But you can take it to any dealer with the VIN and confirm the update has been performed. If needed, they will fix it for free.
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  9. UConn Husky

    UConn Husky F1 Rookie

    Nov 11, 2006
    4,425
    CT
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    Jay
    #9 UConn Husky, Jul 21, 2009
    +1, nice post...I had to take my 355 in to the deal for the fix, no charge and done while you wait.
     
  10. eulk328

    eulk328 F1 Rookie

    Feb 18, 2005
    2,800
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    F683
    #10 eulk328, Jul 21, 2009
    Gracias. If I knew where to get the single terminal I would do it myself (assuming it has not been done yet). No dealer real close around here :-(


     

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