DTC Detection Logic

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0030	HO2S1 HTR B1 (HO2S heater control circuit bank 1 sensor 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	A/F sensor 1 heater (bank 1) signal
		Threshold	Deterioration in A/F sensor 1 heater performance. (Voltage signal transmitted from A/F sensor 1 heater to ECM is higher/lower than voltage in the normal range.)
		Diagnosis delay time	--
P0050	Heated O2 sensor heater B2 sensor 1 (HO2S heater control circuit bank 2 sensor 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	A/F sensor 1 heater (bank 2) signal
		Threshold	Deterioration in A/F sensor 1 heater performance. (Voltage signal transmitted from A/F sensor 1 heater to ECM is higher/lower than voltage in the normal range.)
		Diagnosis delay time	--