No one can help if you don't give specific information about what vehicle you are working on. We don't know if you have the MK808 at current update level. If you do,  Check your Function viewer App on the tool to see if the function is listed for your make model car. Never buy a tool and assume it has what you want it to do on your personal car. Check vehicle coverage listed first.

https://www.auteltech.com/vehicle-coverage/coverage2