P2195 07 Prius stalls at highways speeds

My 07 after 3-5 miles of driving at 60mph+ …will suddenly starts blowing black smoke out tail pipe, mpg drops to 15mpg, stops charging hv battery and gradually rolls to a stop as battery becomes depleted. Powering the car off for a 2 minutes allows the car to restart and run normally…I do need to wait a few minutes for hv battery to charge up… then car drives fine the rest of the trip. Throws codes p2195 “ Bank 1 sensor stuck lean” car runs fine under 60mph. Aftermarket Upstream O2 sensor is 3 months old. anyone have any thoughts on this issue?
Thanks
Frank