My 2000 S70 2.4 threw a code for the fuel tank pressure sensor. When I went to fuel up, it wouldn't accept it at full flow (clicked off when I squeezed the pump handle all the way) and I had to add it a little at a time, so yeah, there seems to be something awry. Should I start with the evap system, and if so, where do I look first? The car's been sitting for a while, had a big rodent nest on top of the engine, now gone, starts and runs ok. And where might that sensor be located?