Hey guy as the title say my car threw this code 2 days ago. Running lean bank 1. I check my cai for any intake leaks at all, none. Check for blockage anything and it's good. I saw a thread here that azure talked about idle relearn. My car was idling about 500-600rpm so I did that and it cleared the code but came back today. My family mechanic is pretty much certain it is a vacuum leak and I'm getting my car to him tomorrow I was just curious if based on what I saw you could see any other possibilities such as maybe an bad intake gasket or something else, thank you
Edit: I should clarify, my only symptoms I have noticed is the low idle rpm.