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.

NOTE: If DTC P204A is displayed with the following DTC, first perform the trouble diagnosis for other DTC:

P203F. Refer to DTC Index .

The SCR dosing system is an In-tank system with a DEF supply pump assembly that controls the dosing pump and monitors DEF heating, level, quality, pressure and temperature. This Dosing system is powered by battery voltage. The DEF supply pump assembly activates priming, dosing, heating and purging of DEF using data provided by the Engine Control module (ECM) via CAN lines. The DEF supply pump assembly performs its own diagnostics and reports malfunctions back to the ECM. The ECM then decodes the error and converts it to a Diagnostic Trouble Code.