sub2001pav

Fuel gauge in my Legacy 2001 periodically shows that I am empty on gas, after that if could show in a few minutes that my tank is full. Also check engine light goes off and on several time a day (but not simultaneously with fuel gauge fluctuations). I checked codes in Autozone and they found: P0463 Fuel level sensor circuit high input Does anybody had similar problem? I was told that Fuel level sending unit might need to be replaced. I still have my old Legacy 1995 which I am going to salvage after moderate accident. Could anybody tell me if 1995 Legacy 1995 and 2001 Legacy have the same Fuel level sending unit? In they are the same I might be able to take that unit from 1995 Legacy to 2001.