99 cobra

[1mustangsvt]

iam getting a check eng code lean bank one and two car runs good no miss and it has planty of power has any one had this problem? if so what did you do to fix it. i have looked for vacumn

 

[wmburns]

Always post the full DTC codes. There are 1000's and they each have a story to tell.

However, lean codes are usually vacuum leaks or exhaust leaks. Start by checking all hoses. How about the PVC valve?

 

[1mustangsvt]

I did have a exhaust leak took care of it and code went away for about a week came back today I have check all vacuum lines there all good PVC also good