SLOW DOWN light when cold — 2002 360 — Cat ECU’s ? | FerrariChat
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SLOW DOWN light when cold — 2002 360 — Cat ECU’s ?

Discussion in '360/430' started by Modenathebeautiful, Sep 28, 2025 at 1:18 AM.

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  1. Modenathebeautiful

    Modenathebeautiful Rookie

    Jun 17, 2007
    39
    #1 Modenathebeautiful, Sep 28, 2025 at 1:18 AM
    Hi All — my 2002 360 even when cold is showing the “SLOW DOWN” light. It either stays on and there is a loss of power, or it flashes intermittently. Dealer saying $ 5,200 to replace both cat ECU’s and both thermocouples (temp probes), which seems very high. On YouTube they are installing new ECU’s in about five minutes, but the thermocouples look more difficult. The ECU’s are notorious for failing, so maybe best to have just those done? Or do them myself? thanks
     
  2. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    14,559
    Sydney
    Full Name:
    Ian Riddell
    #2 Qavion, Sep 28, 2025 at 2:12 AM
  3. 066/8

    066/8 Formula Junior

    Sep 29, 2023
    281
    #3 066/8, Sep 28, 2025 at 2:26 AM
    This might be voltage related - if so, it can be fixed by charging or replacing the battery.

    I personally would not spend 5k for replacing approximately 1k of parts, without having a clear diagnosis first.
     

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