DTC Detection Logic

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) detected the Mass Air Flow sensor is at least 20% more than estimated:

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0104-00	MASS AIR FLOW (Mass or volume air flow "A" circuit range/performance)	1	Diagnosis condition	ECM detected MAF is 20% more than estimated
			Signal (terminal)	Voltage signal transmitted from MAF sensor to ECM
			Threshold	A high voltage (≥1.2 V) from the sensor is sent to ECM under light load driving condition
			Diagnosis delay time	Diagnostic runs continuously when the engine is running
		2	Diagnosis condition	ECM detected MAF is 20% more than estimated
			Signal (terminal)	Voltage signal transmitted from MAF sensor to ECM
			Threshold	A low voltage (≥ 0.8 V from the sensor is sent to ECM under heavy load driving condition
			Diagnosis delay time	Diagnostic runs continuously when the engine is running