Error codes; help needed

[hunker7]

Hi guys, I have few codes that keep coming back and I can't seem to find why.

16514/P0130/000304 - Oxygen (Lambda) Sensor B1 S1: Malfunction in Circuit

16534/P0150 - Oxygen (Lambda) Sensor B2 S1: Malfunction in Circuit

17538/P1130 - Fuel Trim; Bank 2 (Mult): System too Lean

17536/P1128/004392 - Fuel Trim; Bank 1 (Mult): System too Lean

17538/P1130 - Fuel Trim; Bank 2 (Mult): System too Lean

Lambda sensors have been replaced (Bosch) and MAF seems to be working fine. Any ideas?