Which are you trying to accomplish? What OBD2 adapter do you currently own?
Access to "service" and "configuration" functions like PATS (key programming), module initialization, and ECU flashing. forscan lifetime extended license
Avoid cheap, generic ELM327 clone adapters with manual toggle switches. They often suffer from high latency and data corruption, which can "brick" (permanently damage) a vehicle control module during programming. How to Get an Extended License (Step-by-Step) Which are you trying to accomplish