the more electronics complications, the worse the repair issues and cost
(clean and simple: may need adjusting more often but is solid and easy and reliable)
i'd rather (1) uplug it or (2) warn me early rather than warn me late. compare to other new ones.
get a manual page or ask dealer what kind of sensor. is it inside tank ? if so you can't access it and the job would take a while to replace (dealer)
i agree with the guy ^^. this isn't worth your time. i have only a spedo, oil light, shift light. and i'm thankful they made it that way.
i've replaced sensors inside car tanks
you can ask dealer. but it's probably the case that the fuel sensor is separate from any other tank sensor (if there are any).
you could say: i'll have them put on a new tank with same paint since i might get repair issues if the sensor is shorting
but a fuel light won't stop your bike or cause performance issues - it's just a dummy light. be "green". don't be throwing away a tank for a dummy light.
I KNOW. look you said your dealer has a record. keep your receipt of it. harley is a fine company if your tank "fails" later i'm sure they'll hoonor it.
anyway. maybe it's a "tank 1/2 full" light. i never go places without a fuill tank, personally. that way i don't get surprised - reserve doesn't go that far to the closest gas station if your not in a farm area or in a traffic jam!