DTC Detection Logic

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal fluctuates according to fuel feedback control.

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0130	A/F SENSOR1 (B1) [Air fuel ratio (A/F) sensor 1 (bank 1) circuit]	A)	Diagnosis condition	-
			Signal (terminal)	Air fuel ratio sensor 1 signal
			Threshold	The A/F signal computed by ECM from the A/F sensor 1 signal is constantly in a range other than approx. 2.2 V
			Diagnosis delay time	-
		B)	Diagnosis condition	-
			Signal (terminal)	Air fuel ratio sensor 1 signal
			Threshold	The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 2.2 V
			Diagnosis delay time	-
P0150	A/F SENSOR1 (B2) [Air fuel ratio (A/F) sensor 1 (bank 2) circuit]	A)	Diagnosis condition	-
			Signal (terminal)	Air fuel ratio sensor 1 signal
			Threshold	The A/F signal computed by ECM from the A/F sensor 1 signal is constantly in a range other than approx. 2.2 V
			Diagnosis delay time	-
		B)	Diagnosis condition	-
			Signal (terminal)	Air fuel ratio sensor 1 signal
			Threshold	The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 2.2 V
			Diagnosis delay time	-