Please help - p2096 and p1092 SES Code

[mystere]

Hello, please help, I am all out of options on what to fix next on my vehicle as I have taken it to several shops and they are all telling me to change something different from one another. I hate to spend money on something that does not fix the issue. There's a lot of I think without any assurance. I've been pulling P2096 Post Calayst Fuel Trim Too Lean Bank 1 code for some time now (about 1 1/2 months). I believe the BMW code is 225. The car runs fine with the exception of a slight rough engine idle. I have already replaced both pre and post Oxygen Sensors. I have replaced the Camshaft Exhaust Sensor and still pulling the code. One shop told me to change the fuel injectors and another shop has told me to change the calaystic convertor. Another has told me to change the MAF sensor and so forth. Please help. By the way, I've also had a shop run a "smoke test" to see if there is any leaks but I do not. Any help is greatly appreciated. What should be fixed in order to resolve this check engine light code of P2096?

Also, I am also getting P1092 code (Pre-Catalyst Fuel Trim Too Lean Bank 2) once in awhile. Not so much as P2096. P1092 comes I say about 10% of the time.