DanDum

The O2 sensor was replaced by a garage, I hope they readapted. I noticed I have 2 pressure sensors (one has both ends connected and the second only one) and they are next to eachother. Should I replace them both?

Hi everyone, I hope I'm not going to create a double post (couldn't find anything similar). I have a A6 2.0L UltraTDI 2015. My issues started last year in April when the DPF light came up on my dash. I had an error for the O2 sensor which I replaced. Since then it keeps coming and going all the time. After it comes up, if will not take it on the motorway to do a regen, eventually it will go into limp mode with error DPF regeneration duration. In the last year I've replaced the O2 sensor, EGT2 sensor, turbo, EGR. Nothing changed. I took my car to 7 different garages including Audi garage and Audi specialists garages. No one can find the reason. I've cleaned the DPF with one of those company that comes to your house and does it but nothing changed. When I have the DPF error on my dash it's not showing anything on VCSD. Any ideas of what might be? Thank you