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
P0031	A/F SEN1 HTR (B1) (HO2S heater control circuit low bank 1 sensor 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	A/F sensor 1 heater (bank 1) signal
		Threshold	The current amperage in the A/F sensor 1 heater circuit is out of the normal range. (An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater.)
		Diagnosis delay time	--
P0032	A/F SEN1 HTR (B1) (HO2S heater control circuit high bank 1 sensor 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	A/F sensor 1 heater (bank 1) signal
		Threshold	The current amperage in the A/F sensor 1 heater circuit is out of the normal range. (An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater.)
		Diagnosis delay time	--
P0051	A/F SEN1 HTR (B2) (HO2S heater control circuit low bank 2 sensor 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	A/F sensor 1 heater (bank 2) signal
		Threshold	The current amperage in the A/F sensor 1 heater circuit is out of the normal range. (An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater.)
		Diagnosis delay time	--
P0052	A/F SEN1 HTR (B2) (HO2S heater control circuit high bank 2 sensor 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	A/F sensor 1 heater (bank 2) signal
		Threshold	The current amperage in the A/F sensor 1 heater circuit is out of the normal range. (An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater.)
		Diagnosis delay time	--