Where is the mass air flow sensor located?

I have 2017 Plus with the G 2.0 NU GDI engine.

I had what I think was a random P2191 episode where the rpm started to rev.

The fuel economy is fine,I have no start up problems and the car was running fine later on yesterday and today. In addition, the catalytic converter was recently replaced.

I ask because we did have some major fires and I noticed that the air filter was dirty when replaced it last weekend. I am thinking maybe the maf sensor is dirty.