Hello together, I was yesterday with the Punto Evo (1,4 petrol) of the friend at the TÜV that she had increased 1.5 years ago.Unfortunately there was no badge because he did not pass the AU. Lambda value too high and CO value too high. (No error code and no indicator light on) Now I was in 3 workshops grossly inquire.One says certainly exhaust system leaks appointment in 2-3 weeks free to look up. 2 says completely check it speaks for false air but date is possible at the earliest in 3 weeks. The 3 says neither exhaust nor Lambda but maybe only spark plugs. I am questioned myself and thought I would ask the Fiat experts among you. Greetings