DTC 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 sets DTC P261000 when the ECM/PCM indicates an error in the internal ECM/PCM engine off timer processor. The test fails when the difference between the engine off time and the LPC (Low Power Counter) time exceeds a calibrated limit for a calibrated amount of time.