Check Engine Light keeps coming off and on; especially after long idles at stop lights. The Mass Airflow sensor was replaced (11/19/19); Oxygen Sensor replaced (11/11/19); Intake Manifold Gasket and Throttle Body Mount Gasket replaced (9/28/2020). It was fine, but has now come back on and off a couple times since then.
Have the codes read and post back and please post the mileage.
The mass airflow sensor is dirty. Remove it and clean it with carburator cleaner. A dirty air filter is the cause for this part to go bad.Make sure you buy a new air filter and replace it.
Check for any air leaks in the air intake duct.
If air leaks into the engine after the MAF sensor, it’ll set that code.