DTC Description
WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
The PCM sets DTC P261000 when the PCM indicates an error in the internal 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.