Somthing make check engine light go away

if disconnecting the battery, the positive pole with the ignition open for 10 second and you connect it again

Yes they can reset the CEL, but unless you fix the problem the light will come back.

Yes I don't know the name

Clear it with a computer

You could clear it with a computer if it comes back up you have to fix the code

Fixing the car makes check engine light go away. AutoZone does free check engine light diagnostic.

What? Take it there and have them check engine code for free. Google the code, take it from there.