Welcome. Start with a fuel filter. If that does not work, then test the fuel system pressure. It should be 55-62 psi or 48-55 psi if you have the flex fuel issue.
I doubt very much that the sensors are bad.
Thanks for the reply. I forgot to mention that it is indeed a Flex Fuel model. Any idea what to expect for a fair/typical price for the dealer to charge me for a filter replace? Fuel pump r & r?