[350Laney]

Check engine light was on for Mass Air Sensor, when I went to smog truck. I replaced sensor have driven truck 200 miles plus. Check engine light won’t turn off

 

[Stroking it]

Try this. Scroll down there are a couple ways to reset a MAS

How to Reset a Mass Air Flow Sensor? (Step By Step)

Want to fix Mass Air Flow sensor issues on your own? Discover the steps to resetting it here.

www.motoraudit.com

 

[Nickelplated5s]

You are under emission warranty. I believe that is 100K.