I just did tranny fluid change and had to disconnect MAF sensor, made mistake and started car with sensor disconnected and got a yellow engine light and check emissions notice. Plugged back in and ran it for little while ,light is still on.

Anyone can help figure out how to reset this? Or will it go way after running car for while?

 

disconnect neg. terminal on battery.
wait a couple mins, and then re-connect

 

Turns out the light went out by itself.