what is U1016 and how can i fix the problem myself

Hello, Before we begin a discussion, check both ends of the battery cables, and make sure you are in the 12.4-14 volt range when the engine is running. Let me know if you find a corroded, broken, missing, or loose connection, as this is typical. Aside from that, you will want to locate and check the body control module (BCM) for proper function.