mass air flow sensor

I replaced the mass airflow sensor, and my car went from stalling and idling rough at stops to running smooth Although it is running smooth, the check engine light is on. Funny thing, after replacing the sensor and disconnecting the battery, the light never came on, even driving 50 miles...

I'm starting to pull my hair out... After putting half a tank of gas in at a gas station, my check engine light would come on and off. My Lesabre stalled out on me 5 times over the next 3 days while around idle in gear. I put in octane booster for the remainder of the bad tank and put a can of...