Outstanding video on diagnosing "system too lean bank" and how to utilize a scan tool

[GON]

Researching a P0171 system to lean bank 1 error, I came across this video.

This video is outstanding at diagnosing system to lean error, and how to use a cheap handheld scan tool. A long watch, but is a great training video.

 

[LazyDog]

I seen that video and bought the scanner.