Forgive my waking this tired 'ol thread, but I'm having the EXACT same codes thrown at the moment.

P1171 - Fuel System Lean During Acceleration
P0157 - O2 Circuit Low Voltage (Bank 2 Sensor 2)
P0137 - O2 Circuit Low Voltage (Bank 1 Sensor 2)

My wrench swears up and down that he already replaced all the O2 sensors with brand new ones. He's at a loss. Therefore I am at a loss.

Snowtrooper, can you put please a ribbon on this one and tell us if and how you solved this set of codes?

Thanks,
-V