So I've noticed that on my screen that it doesn't know mpg stats from previous fill ups. I was wondering if there's a certain internal switch that I need to activate to show the readings from previous fill ups? All it shows me is current readings, but on the bar graph it always stays empty. My car is an 09 Prius. Open to any ideas.
The Gen 2 does not have a historical MPG database. What bar graph are you referring to? The fuel tank ?
