Check engine light came on with a 1999 Porsche boxster and the computer codes read 1123 and 1125 lean idle?

Hi. I found this on another page. Hope it helps Peter P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold