Peugeot 207 Incorrect Vehicle Coding Error

I encountered a comparable issue with my previous vehicle, a 2014 Opel Astra. The symptoms you describe mirror my experience. The diagnostic scanner also pointed to a coding problem. Were any recent software modifications performed on your vehicle's computer system?

No, there haven't been any software modifications that I know of. I bought the car second-hand a few years ago. Is there anything specific I should be looking for?

In my case, the eventual determination was a corrupted software module requiring reprogramming. Given the absence of recent modifications, I would recommend a comprehensive diagnostic examination at a reputable repair workshop. It's plausible that a module has failed or the coding has somehow become corrupted regardless.

I took it to a reputable workshop as you suggested, and it turned out the car's computer needed to be recoded. The final bill came to 360€, but at least the problem is now solved. Appreciate the help!