Error code P0133

Hello Hyundai friends have already posted this topic somewhere else above no answer, maybe you know some advice.So I read out the error memory with my OBD 2 tester at my Hyundai Tucson and the here then P0133 Lamdasonde response behavior too slowly. Now my question is the Lamdasonde broken or what to do.You may know what to do the error has occurred several times. Mfg Gerhold