DTC B1810-00: UIP/ROA Sensor Error: General Description
WARNING: This page is about a different car, the 2024 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.
ROA sensors installed in the headlining act as a sensing device for indoor movement while the vehicle is locked. The secondary notification request signal is output to the BCM for room movement detection.