i have tried over and over it is up to date batt is fully charhed is there anything i can do?
All it says when i hit write veichle.is turn key to on, i turn the key but then says no ecu found

Hello just purchased a DCXfor 2012 ram i am nit able to tune the truck ar all
It says no ecu found i have the latest update battery is fully charged and still not able.
What can i d0?