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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (4 Of 6)) >> DTC/Circuit Diagnosis >> DTC P1C54-00: SCR NOX Catalyst Missing >> DTC Description >> Notes

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 ECM monitors the NOx concentration in the engine's exhaust gases using an aftertreatment intake NOx sensor and an aftertreatment outlet NOx sensor. By comparing these two values, the ECM is able to determine the conversion efficiency of the SCR catalyst and dosing system.