However, in this case, the fuel sensor failure caused a total system
failure,

Actually, we do not know this. We can assume it, and the evidence is
pretty strong, but there might have been other factors which we don't know.

True. In addition to the fuel sensor "overload" (it didn't really fail
-- it just sent info to the G1000 that made no sense), he also
experienced a CO sensor failure, and (later) a tach failure.

It's hard to say what caused what to happen, without more data.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"