Start by clearing the codes and if it reoccurs, see if only one of codes reappears instead of both next time. If they both reappear right away again I'd check the wiring harness near where the two starter to trans bolts are (where the harness bends around) and you'll need to remove the conduit to do that. Look closely at that harness from the two sensors making sure there's no broken or shorted wiring. I too wouldn't think you'ld see two bad sensors at the same time but both share that harness. You might need an OEM wiring manual and a good VOM to check each of the sensor wires continuity between the sensors and ECU with both sensors and ECU unplugged (ECU box connectors loose), not "fun" and can be time consuming.
If the wiring is OK, you're left with sensors or an ECU but it can get costly if new and those parts are usually not returnable.

If it fails to start, a permanent fault then it will be easier to determine which sensor or wire is causing the problem as you can then test to voltage and/or continuity to see what does, doesn't have its signal. It's the intermittant faults that are much more difficult and time consuming to properly diagnose w/o guessing. Guessing can be very expensive if you're guessing wrong.