Hi just had a code of p0174... autozone code reader said "second bank lean".. After reading code , the warning light turned off.. does anyone know what this is for?

 

They probably cleared the code when they had it on the reader...

If it doesn't come on again don't worry about it, if the problem is still there you will get the check engine light again very soon and you can start troubleshooting then.

 

Thanks