lamda 4.2 bj97

Hello! I've got the problem that my cats were too, I've just beaten them out to be able to drive properly. the car only two months. now I have changed the ignition lock switch today and also the kat-birnchen-12v -1,2watt. and now I am also happy to delete the cat lamp before start after the error (cat control light interrupt or short circuit) and as the motor then ran out again - should be so!!! but now it is so that the cat lamp after a while in running again. I guess that's a lamda probe! Right? Errors are not filed! so I measured on the one side it is about 10 ohm and on the other side 16 ohm at 20 degrees and in the air flow measurement was in the stand gas both around the 4,4 with the gas give however the one value just up to about 10 and the other but so about 25 -30. Can anyone tell me anything? Please don't suspect me, because I'm on the level right now.
thank you very much in advance