How much would it cost to replace the problem code p0102

The Mass Airflow sensor has two bolts and is $170 at Autozone. Very easy to change. Before you do that, try removing the MAF from the intake air tube and inspect it. There will be two very small wires inside that the intake air blows across. See if one of the wires has a bunch of crusty build up on it. You my get lucky and clean it. Search YouTube or Google on how to do it.

Mass airflow sensor and easy to do