Check engine light came on so I went to autozone to read the code. They said bank 1 & 2 or too lean? Is this some type of sensor going out?

 

most likely a vacuum leak

 

Check for any obvious hoses not hooked up. Then try cleaning the MAF sensor.



This stuff works great. remove the MAF sensor and spray it down throughly.. on the sensor part.. (The wire). Let it dry for an hour of so.. then re-install. Leave the battery unpluggd while your cleaning the MAF..

Try this and report back with results.

 

How many miles on the truck? Any modifications?

 

when was the last time you changed your fuel filter?

 

probably a vacuum leak, like Tally mentioned.