I have a 2003 Ford Fusion and it doesn't support fuel level pid neither. I'm also looking for a way of getting this info from the ECU if there is one!
Meanwhile, I have to calculate myself the remaining fuel level, starting from instant fuel consumption that I cumulate repeatedly every short period in order to know how much fuel was burned, and thus how much is left... And of course I have to reset the gauge manually each time I fill up my tank... Moreover, the formula I'm using to get the instant consumption is not accurate at all, so that my fuel gauge is not reliable for now.
I really hope someone has ideas to submit about that!