Fuel gauge 550 | FerrariChat

Fuel gauge 550

Discussion in 'Technical Q&A' started by Terry Godbout, Dec 23, 2003.

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  1. Terry Godbout

    Terry Godbout Karting

    Dec 23, 2003
    Coeur d'Alene, Idaho
    Full Name:
    Terry Godbout
    The fule gauge on my 2000 550 Maranello does not read full when I top pff the tank. Is anybody else running into this problem? Is there a fix?
    The Ferrari dealer supposedly replaced something on the fuel warning light system just before I bought the car.

  2. bobafett

    bobafett F1 Veteran

    Sep 28, 2002
  3. Ferrari_tech

    Ferrari_tech Formula 3

    Jul 28, 2003
    Full Name:
    Malcolm W

    The most common cause is the fuel tank sender unit - part number 168238. To test, there are two wires that go to the tank unit, one controls the low level warning light and the other the guage. By "grounding" these wires one at a time will test the guage. The guage should show full when the guage wire is grounded and the warning light will come on when the other wire is grounded - you will need the ignition on for this test. If this test proves positive then its the sender at fault.


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