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CEL with no codes

Discussion in '348/355' started by Lucky355F1, Jul 25, 2009.

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  1. Lucky355F1

    Lucky355F1 Rookie

    Apr 23, 2008
    36
    Bridgewater, NJ
    Full Name:
    Jeff
    #1 Lucky355F1, Jul 25, 2009
    My CEL came on today on my 98 355F1 (5.2). I tried two different OBD2 scanners (Snap-On and an Actron unit). Both scanners found no codes present systems passes. Even tried clearing the flash memory. With no help. The extra ground on pin 4 of the OBD2 connector is present also. Sign of the ECU failing or is something I will have to use an SD2/SD3 find out why? Any suggestions? Thanks.
     
  2. Loser

    Loser Formula Junior

    Apr 11, 2008
    791
    Gilroy, CA
    Full Name:
    Tom
    #2 Loser, Jul 26, 2009
    You could have it read with an SD2 at a Ferrari shop. Maybe someone switched the gels around and you are actually seeing the battery light or something else. Check the indicator locations with the shop manuals. This actually happened with mine and I had to get a new set of indicators. Apparently the previous owner had made modifications that caused the CEL light to illuminate, so he switched things around so it still looked like the CEL light would turn on then off when you started the car and he pulled the actual CEL bulb. The bulbs are controlled on a circuit board, so you can't move the locations of the lights around, you can only cut and move the gels around. So the shop manual will show you what the lights actually mean even if the gels are incorrect.
     
  3. No Doubt

    No Doubt Seven Time F1 World Champ

    May 21, 2005
    72,740
    Vegas+Alabama
    Full Name:
    Mr. Sideways
    #3 No Doubt, Jul 26, 2009
    First, I don't know about M5.2...but... Would *guess* that a cel with no codes would mean that
    Your ecu is failing a memory checksum internal test and just needs to be reflashed by a dealer.


    I say that because that's what you see on M2.7 when an eprom fails, and I do know a little about M2.7!
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,106
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #4 Rifledriver, Jul 26, 2009
    Last edited: Jul 26, 2009
    It happens. 5.2 was rushed to market not unlike Bill Gates does over and over with Windows. It is very buggy. Sometimes in your situation if you have it on an SD2 and ask it to print errors it will print some out. If that doesn't work erase it and see what happens.

    I would be certain of proper CEL light functioning as you have alredy been told.
     
  5. Lucky355F1

    Lucky355F1 Rookie

    Apr 23, 2008
    36
    Bridgewater, NJ
    Full Name:
    Jeff
    #5 Lucky355F1, Jul 28, 2009
    The CEL light is in the right placed it did come a year ago. I cleared it with my actron OBD2 reader. I assume only a dealer can reflash ecu?
     

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