no. I didn't do anything dumb !! Thats why I am all puzzled. I did everything correctly.
I followed the youtube link. got to Diagnostics screen. no codes. donno??
fuses all ok.
Should I disconnect the battery and reset everything?
My S10, 2012 going thru my third battery.
I put in the new battery today, starts fine, runs as good as before but now I have Check engine light on permanently.
What is going on ?