have the same problem P0453 fuel tank pressure sensor high input, check reference wire 0 volts now I need to know how to replace FTPS on a 2002 mercury sable gs the tubes are plastic do i need a heat gun to remove and replace or put new lines in made of rubber?

replace
 

I gave up on the tubing on top, it was old and brittle. I bit the bullet and got the hose assembly. It was NOT available aftermarket, so I had to go buy it at the local Ford Dealership. Not cheap, but neither was having a car up on blocks waiting. They had plenty of them in stock around the country, so no problem getting one in a day or two. Sorry it's not better news. I've had it back on the road for some time now, so replacing that sensor was the right fix. I recommend replacing the big gas filter in the line near the rear door shortly after this, as you might get gunk going by this repair.