Can you please explain to me exactly what it means to reset mixture adaptations

 

fuel/air mixture?

 

Well your truck adapts to the way you drive adjusting different parameters to get the highest efficiency. I assume Testbook has a way of resetting these parameters to the factory values and maybe that is what you speak of?

 

What lipadj46 said, but you dont have to do that with Test Book, it will reset as you drive.
Unless there is a problem that will not let it adapt...like a bad O2 sensor.

 

Thats what the dealer did last week when I had 1172 1175. He then did a drive cycle, so can I expect the ses to come back on??