Hi guys i am getting a pcode P0171 running lean on bank 1. Is bank 1 on the passenger side? is this code the upstream 02 sensor or should i be checking other things as well.
Thanks

 

The first thing to check is the 90* vacuum connections at the intake manifold, the one at the rear of the manifold is the most likely problem. They usually come apart in the inside of the elbow. Autozone has the part in the "Here's Help" section.

 

Found the vacuum leak right at the pcv valve. Nice easy fix.
thanks

 

If it was the elbow you might want to replace any others, especially the 1 at the rear of the intake manifold.