Radio trouble

Yes this is an antitheft code if the radio is stolen it keeps the thief from being able to use it unless he has the code very simple procedure for this you should have written the code down when you bought the car in your owners manual also there you will find the procedure for entering the code into the radio if you didnt write the code down call the dealer and have you vin # ready they will ask for that and your name then they will give you the code and tell you how to enter it problem solved