BraveArc

Hey guys, sorry for reopening an old post. My car suddenly gave the engine warning light. My car has the track pack with navigation so I pressed 3&6 in the audio system. After the speaker test, I checked the DTC. It says "U210100 config error". Can anyone tell me what this means. The engine light just stays on but the car feels fine. Although I drove it straight home and haven't touched it since. I've got a 2013 Mustang 5.0, driven 54,050km(33600miles) if that helps.