DTC Description: Notes
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
The Engine Control Module (ECM) continuously monitors the engine speed at idle and adjusts fueling to maintain governed idle speed. The ECM checks if engine speed is within nominal idle speed for an accumulated amount of time. When the accumulated amount of time exceeds the limit, the engine speed is checked once again. If the engine speed is higher or lower than the acceptable boundary, an error is set.