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550 engine light on says go slow?

Discussion in '456/550/575' started by negoce8, Oct 18, 2005.

  1. negoce8

    negoce8 Rookie

    May 3, 2005
    12
    01 550 engine light went on with flashing to drive slow. The car seems to run just fine. Is this a sensor gone bad or something more serious?
     
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  3. goldyF355

    goldyF355 Formula 3

    May 30, 2004
    1,408
    Toronto
    Full Name:
    Steve G.
    Go slow light flashing isn't that bad...when its lit solid its time to pull over!

    I believe the "Go slow" is a measurement of Cat temperature... as opposed to the "check engine" which could be any old sensor. This should definately be checked out by the dealer...sooner rather than later. No way to diagnose this over the internet, you need the computer hookup to tell exactly what is wrong,...could be little or lots...Good luck!
     
  4. mrmckay

    mrmckay Formula Junior

    Jul 14, 2003
    488
    MD, USA
    Full Name:
    Chris
    The O2 sensor probably failed. I had a lot of problems w/ mine failing on my old 550. Can you exceed 3k rpms? ( I think that is the limit in limp mode? )

    Regards,
    Chris
     
  5. stephens

    stephens F1 Rookie
    Lifetime Rossa

    Feb 13, 2004
    4,483
    Australia
    Full Name:
    Stephen S
    The slow down light is triggered by the thermocouples and attached control units, not the O2 sensors.
     

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