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) check for Exhaust Gas Recirculation (EGR) flow conditions that are outside of a calibrated amount by calculating an error based on the commanded and actual EGR flow. If the error is outside of the calibrated amount for a period of time, the diagnostic fails.