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) monitors the aftertreatment for active over temperature DTCs. This DTC indicates that the aftertreatment temperature DTCs that have been active for an extended period of time and the ECM has shut down the engine.