DTC P2610-00: ECM/PCM Internal Engine Off Timer Performance: General Description
WARNING: This page is about a different car, the 2021 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.
The ECM/PCM keeps internal counting to calculate the model values related to temperature under Ignition "OFF" condition. The ECM/PCM uses this values to improve efficiency when the engine starts again.