My engine light is on and have spent thousands of dollars to get it resolved. on 2007 Chrysler Aspen

I replaced the O2 sensors, fuel pump,intake manafold, exhaust manafold, exhaust,and now the computer. Still have the same problem lean on bank 1.... What else can it be?

Asked by for the 2007 Chrysler Aspen
sounds like a vac leak on bank 1 did you have a smoke test done lately.that may show you a small leak poss under dash or poss mass air flow sensor. did you do the work or a shop?
Chrysler, seems to be a parts changer rather than a mechanic.
2 more answers
Perhaps its time to have a good technician do the diagnostics and fix the problem. Not anything I could tell you other than guessing at parts to replace and that has not worked so far.
You have a vacuum leak
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