Why does the 4 wheel drive light keep flashing?

The flashing 4-wheel drive (4WD) light typically indicates a malfunction or an issue within the 4WD system. This could be due to a range of problems, such as a faulty sensor, a problem with the transfer case, or low fluid levels. It may also signal that the system is attempting to engage or disengage improperly. It's advisable to consult the vehicle's manual and have a professional mechanic diagnose the issue to prevent further damage.