Hey everyone, I just got my Ultra-Gauge EM Plus for my 2002 Honda Civic EX manual. I was so excited to plug this bad boy in and start seeing where i can optimize my driving to get me even better mileage. Right now based on each fillup and miles driven, we are getting around 35-38mpg. This is purely based on using miles driven since last fill up divided by gallons filled to the first click. Well now that I got my ultra gauge plugged in, I keep getting warned of a trouble code P1298. Based on engine-code.com it seems like i have a dead ELD or ECM. Does anyone know of any methods to test the ELD and ECM to see if one or the other is dead? Whats really strange is I am not seeing any check engine lights either. I'm also not even noticing any sort of miss-fire either. Anyone have any tips/recommendations or experiences with this? I find it odd that I'm not feeling any sort of loss of power due to miss firing and no real symptoms are showing that theres a problem. NOTE: I forgot to mention, that when sitting idle, the inst MPG is sitting at 0.00, however when i am actually driving around the inst MPG and avg MPG is showing in the mid 100's to high 1000s. It was showing I was getting anywhere from 300 mpg to 3000 mpg.