The diagnostic ecosystem for older PSA vehicles is split by brand, though they share the same physical interface:
The landscape shifted dramatically when Chinese manufacturers began producing cloned versions of the Lexia 3 interface. These clones, often available for a fraction of the price of the genuine tool, flooded the market. However, they came with a catch: compatibility. PP2000 - LEXIA OLD versions - MHH AUTO - Page 1
For PP2000, the best old version is – last one before they merged into Diagbox. Check the pinned thread in the download section (need 5 posts to see links). I’ll re-up my copy later today. The diagnostic ecosystem for older PSA vehicles is
Strengths (older releases)
Real-time monitoring of sensor data and manual activation of components for troubleshooting. Maintenance Procedures: flooded the market. However