Helps… 607 goes off while driving

Hello together I looked through some things here in the forum but somehow found nothing that helped me with my problem. So before the summer vacation my 6072.2 HDI Bj 2001 had often displayed the particle filter symbol (even after longer distances on the highway), which I had of course ignored. On the trip to the holiday he went out for the first time after about 300km just at 160 kmh. Without stuttering without nothing. I also somehow didn’t want to start. ADAC came and towed mic I decided to find a Peugeot workshop because the 2 ADAC could not tell me the reason what the error is because nothing was to be read except additive filling up nothing in the error memory. After 5 hours in the Peugeot workshop and cost 400 euros, the master could not tell me what the error is there either. He filled the additive which is a A software update changed the sensor for the particle filter and sprayed something into the particle filter. When entering the forced regeneration via his pc he switched off again. He looked a lot but did not find the error. Car was towed off and I drove on holiday 3 weeks After the holiday car works again for about 300-400 km. Bloss now when he goes out he doesn’t want to start. After 3-5 attempts he jumped on And then you could still drive 30-40 km. But now he doesn’t want to jump any more if you drove him for 20 minutes warm. Only after 3-4 hours he jumps again but only until he gets warm. I changed the tanker and diesel filter, but brought me nothing. I am now in Wuppertal near Peugeot who told me that the car did not go out in the 3 days where it stands with him. Error messages Additive pump exhaust gas… sporadically I was advised by a friend the update re Peugeot doesn’t think that would work. But I don’t think that can have anything to do with the update because the error came before the update. Would be grateful for any help since I already invested almost 600Euro for the TÜV and vacation trip before the holiday. 400 Euro at Peugeot and now again with Peugeot and parts 300Euro. It’s annoying because the car doesn’t have so much value to invest in it any more.