Hello dear mechanic, and the following has happened. (Auto: Peugeot 407 Coupe 2.7Hdi BiTurbo) I got the error message exhaust system defective (without emergency run) with engine control light. Was then with a software optimizer who knows nuts and asked him if he could make an Agr off + Stage 1 software. Said done after 10 different software he had no desire any more. He flashed me the “original” up again. I then completely frustrated home. The first 200m switched the Aut o immediately into the emergency program with the error message: counter speed defective. So I then of course completely overburdened. Car only turns up to 2000u/min Then I drove the next day (today) to a very good tuner of which I heard a lot. He flashed me a software with Agr and stage 1. MKL was gone and the error exhaust system also gone. Only the error with the electr. G has remained defective. He is still in emergency run. We tried everything that was in our power, unfortunately without E Rfolg. Because he is an autoelectrician and doesn’t know Peugeot so well. Can someone please help me? I’m really desperate…. And yes I know Agr off does not correspond to the StvO. I would be grateful for any answer.