Yes, if the impeller had a junk buildup like hair or anything that can get tangled in it the pressure should be low. What's the pressure like in other valve settings? Don't know what settings you have but pressure data on any other settings should be a clue. Did this happen suddenly or did you just notice it after sitting for the winter for example? In Georgia you probably would not get a prolonged freeze to damage pipes and equipment, other than the pressure gauge which is quite easily damaged by a quick freeze.
Al