Hesitation/wanting to stall accelerating uphill

Car seems to want to hesitate or stall when driving up hills or accelerating too quickly from a stop. Already had the car smoked and check for vacuum leaks and there didn't seem to be any. The fuel pump and filter and injectors have all been changed recently and hope she remedy the problem and didn't seem to fix it. I clean the throttle body and replace the EGR valve and mass air flow sensors and still nothing. I'm getting a p2195 code, even though both oxygen sensors are brand-spanking-new and OEM specs oh, I'm pretty sure they are oem parts. What could be causing a bank 1 sensor 1 stuck lean code to keep reoccurring and a hesitation in the engine when accelerating?