this indicates that the 4x4 is ingaged or that the sensor think that it is. if you have a push button 4x4 most times it is not disengaging from 4x4 try going backwards a few feet after taking it out of 4x4 mode to see if this does not help .
4x4 indicator light
According to my 2003 manual, the light comes on with approx 2.7 US Gallons (10L).
It means that there is a malfunction in the 4wd system.
all vehicles are have about the same amount of fuel in the tank when the fuel light comes on. there would be about 1 to 2 gallons
That would be the idea. The light reminds you are in 4x4
Bad earth connectionat light cluster
If it looks like a diagram of the drivetrain, then it's the 4x4 indicator light
what to do when the malfuction light comes on?
what does it mean when light comes on
When the low fuel light comes on in a 2007 Toyota Tundra 4x4 with a 5.7L engine, you typically have about 30 to 50 miles left before running out of fuel. However, this can vary based on driving conditions, terrain, and how the vehicle has been driven. It's always best to refuel as soon as possible when the light comes on to avoid running out of gas.
it means when the maintenance light is on
It means something is messed up electrically unless your talking just when you first turn the key on. Then it's possible that during the cluster function test, it comes on for a brief moment if Ford used the same gauge cluster in 2x4 as they do 4x4.