Truck Repair: 1996 Ford Ranger. 4.0 liter, 4x4 automatic., mass air flow sensor, mass air flow

Question
I just bought new tires for my little Ranger, they are a bit bigger than the last ones I had.  My ABS dash light turned on.  Do you know if this is a concern I need to look into or not?                             

Also my check engine light is on, and has been for some time.  I was told it was the Mass Air Flow Sensor, but I don't know exactally where it is.  If you could help  me locate it so I can clean it, would be very helpful.

Thank you in advance.  Nate  

Answer
Hi Nate,
If you bought four new tires, it would surprise me the light coming on, unless a wheel speed sensor wire was damaged during the replacement work.
But if you only bought two tires, it doesn't surprise me at all, since the speed sensors look for a difference in rotation speed among the wheels, and bigger tires will rotate slower.
Mass airflow sensor is in the air intake plumbing between the engine and the air filter.

Van