Catches all the debris that's supposed to be blown out and destroyed through the exhaust. But due to the Ecoboost engine, not all of this debris is destroyed. So it gets caught and builds up over time. A catch-can will prevent this from happening.
I dont know who Dynamic Appearance is
https://dynamicappearance.com/2022-2024-ford-maverick-form-lighting-led-projector-headlights/?srsltid=AfmBOorU4BQlxERwlyPqDillKfUTJVU3RVV7sRpX7Jbm4-Gr-Q4W64JO
I tried unhooking the battery for 3 hours and the code popped up again. I also read through Afe's manual and it never mentioned unhooking the battery. The battery also wasn't unhooked in the PandaMotoworks video.