Leaderboard

Update in regards to my situation. Replaced the sensor with part from AUDI, and not triggering error message anymore. No need for coding either.

While I am sceptical of these fuel additives, I am open to persuasion by long term results. The treatment may solve a sticking pressure switch in the short term but I question if it can solve the more fundamental problem of the exhaust system being blocked by soot, which is what the DPF switch is telling you. If the treatment fails to work I understand it is possible to induce an exhaust regeneration with VCDS or similar equipment. Others here may be able to confirm this point.

I replaced the sensor and the fault disappeared you can watch on you tube how to replace it was a bit fiddly but took minutes. I have a q5 2019

I understand now. If the car has a rear facing camera or radar linked to the brakes than it makes sense to disable that system when towing. I assume, perhaps wrongly, that Audi would have planned for that possibility and that the electrical connections at the tow ball would automatically disable that function.

Thanks @Steve Q, battery was replaced recently. I did google some of the fault codes and this looks a good match for the issue that occurred yesterday. https://static.nhtsa.gov/odi/tsbs/2017/MC-10127910-9999.pdf Referenced from this article https://www.audizine.com/forum/showthread.php/981284-Fuel-Issue-Diagnostics I haven't tried the car yet today but it is cooler so it may be ok at least for me to get it to a garage. Thanks Richard

It might be worth you speaking to Audi to see if they can tell you.