The code lock out computer is not in the OBC, it's in a separate box behind the dash to the left of the cluster.
1. Download the owner's manual to learn how to use the code button. (Google it.) You set the code yourself, so you likely pressed some buttons and now it's coded.
2. Leave the key forward, disconnect the battery overnight and the code may remove itself.
3. Stopped getting baked and / or doing stupid things.