Hello Jazz municipality. A friend of mine bought a Jazz from 2008 with the 1.2l engine and ~120,000km Now start after about 1st week the MKL light with the error: HO2S S2 signal Terminals in the condition fat and efficiency of the catalyst system under the threshold value. So unfortunately I do not start with the first error code anything, my guess is that the error code with the HO2S signal is meant the Lambda probe and the error with the catalyst system is a consequence error of the Lambda probe. Before I now arbitrarily renew probes, I wanted to ask here again.