P0171 Air/Fuel Mixtue Lean Bank 1

What is your question?

Checked for Intake air leaks - None Replaced front heated oxygen sensor Cleaned fuel injectors Checked for Exhaust gas leaks - none Checked fuel pressure - good Cleaned Mass Air Flow (MAF) sensor Checked Positive Crankcase Ventilation (PCV) hose connection - no leaks I am at a loss for what to do next. Any advice would be greatly appreciated.