2002 Ford Taurus Fuel Pump Replacement

2002 Ford Taurus 3.0L engine, 165k miles
Check engine light is on, checked out to P0460 Fuel level sending unit condition. The fuel gauge is erratic - it was over full today before I topped it off with 10 gallons.

Question: since the sending unit is part of the fuel pump, it looks like I need to replace it. Is this a tough job? Is the fuel pump inside the gas tank (as I fear)? How difficult is this job?

Thanks
cliff

The code you gave is for a wiring problem so the trouble may be with the external wiring to the sensor.

Here is some interesting information I found about someone else who had the same trouble. You may want to add some Techron to the next tank of gas to see if that helps you also.