Assuming you just left the 'P' off the codes, they don't make a lot of sense. Per the factory service manual, P1151 means bank 2 indicates the fuel/air ratio is correcting rich for an overly lean condition. P1152 means bank 2 indicates the fuel/air ratio is correcting lean for an overly rich condition.

Do you have the ability to monitor the STFT and LTFT numbers?

-Rod