I've been on this forum a while, but never really introduced myself. I don't own a 406, but I know a bit about Peugeots, and I have a lot of things to my disposal. I do fault code reading and DPF removal as a hobby, so if anyone wants any advice I'll try my best to answer it.
Also if anyone wants any wiring diagrams, guides, warranty checks, security codes, etc, just give me a shout and I'm more than happy to help

Lee