Gas guage reads low near empty

[Qsilver7]

Honestly...I'm not quite sure how to read what happened because there's so many unknown variables.

Due to the odd shape of the e53's gas tank (the left side is approx twice the size of the right side)...and when the tank gets low (exceptionally low in your case from how you described the scenario)...we have no way of knowing how you were driving, if you were stopped on an incline/decline. The fuel level sensors change a lot when the tank is low on fuel as the contents splosh around inside the tank. It can move from the small side to the large side...plus you have the suction jet/pump thingy that bridges the two sides.

Also, if your speed (avg MPH) & the way you were driving changed...then that and other factors can explain why the RANGE went from _ _ _ (empty) to adding a few miles.

When the gas tank reaches the AVG of you having 2.5 gallons of fuel left (it's different depending on which engine is in the vehicle)...that is when the warning light comes on...as this is your "reserve" amount. Again, if your AVG MPH/AVG MPG went up after the red light...then extra miles will be given for RANGE based on the current change in driving habit.

Since the D7 (215) code is illuminated for the right sensor...does your software go into any detail as to what that fault code stands for?

If your cluster is unlocked, I'd run TEST 6 (I think that's the fuel level sensor test)...and keep an eye on if the right sensor is acting odd. It may not show up right away since the tank is full...but as the fuel in the tank starts to drop and the contents get sloshed around...it may affect that sensor to where its data may seem out of whack.

Good luck...hope it works out as just a fluke.