In order to get the Alcohol Content to read properly do you have to start with E0 gas and get trims tuned to no ethanol first? I have a 2013 Charger SXT that is factory FF and have been trying to get mine to read close and anything below E50 is very sporadic. I have NN still enabled. It is all stock engine wise. My trims stay +/- 1-2% and one day it seems like it is reading close to 10% and the next day 0%. I have tested the fuel I run and it tests around E10, plus I have a flex fuel 8.1l Silverado and it reads 9.5% consistently from the sensor, so I know the gas I run seems to be fairly consistent. Also, when I think I'm getting close it will start fluctuating around 10% by maybe 2-3% on startup and then once when it gets close to normal operating temperature it drops back to 0%.