I am getting a171 and 174 code. I know its lean problem on both banks but thats as much as I know. It has new 02 sensors because of those codes and 2 days later I got the lean codes. Any help would be great

Thanks

 

lean codes on both banks could indicate a vacuum leak these are common for hose going underneath the throttle body or for intake gaskets leaking

 

When you figure out what you need let me know

 

Thanks for the info