There are 2 PIDs listed in this Wiki page - Commanded EGR and ethanol%.
I have tried getting the values from some cars but have not succeeded. I am curious to know what do these 2 PIDs mean? Can someone please give a sample data set (if you have) to get a taste of these 2 PIDs.
Does that ethanol% PID tell what is the best ethanol% my fuel should have or what ethanol% is currently in my fuel?