P0101 Buick -

Question

My car failed smog due to a P0101 code. I've checked my Mass Airflow Sensor and I am reading 12.4 volts both to ground and on the hot.
I even checked the hot wire, they look perfectly clean.
My Air Filter doesn't look that dirty but I am going to replace anyway.
What else could be wrong?

Answer 1

P0101 MAF circuit range perfromance problem

The MAF is a digital signal it should have at least 12.0 volts that should just be on the IGN side of the MAF . If the vehicle is running rough and you disconnect the MAF and it runs better,, then its the MAF that is faulty.