"P-Codes" are part of the standard SAE J2012 definition used in OBD2 (On-Board Diagnostics II). Since 1996 (in the US) and roughly 2001/2004 (in Europe/EOBD), manufacturers have been required to use a standardized set of codes for emission-related components.
: Professional Renault tools like "CLIP" natively show DF codes, but many DIY tools (like ELM327) may only show generic P codes or struggle to interpret DF data. renault df to p code converter
You search online for a solution, and you land on the term: . "P-Codes" are part of the standard SAE J2012