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
P0037	HO2S2 HTR (B1) (HO2S heater control circuit low bank 1 sensor 2)	Diagnosis condition	--
		Signal (terminal)	Heated oxygen sensor 2 heater (bank 1) signal
		Threshold	The current amperage in the heated oxygen sensor 2 heater circuit is out of the normal range. (An excessively low voltage signal is sent to ECM through the heated oxygen sensor 2 heater.) ECM detects the heated oxygen sensor 2 heater circuit is short to ground.
		Diagnosis delay time	--
P0038	HO2S2 HTR (B1) (HO2S heater control circuit high bank 1 sensor 2)	Diagnosis condition	--
		Signal (terminal)	Heated oxygen sensor 2 heater (bank 1) signal
		Threshold	The current amperage in the heated oxygen sensor 2 heater circuit is out of the normal range. (An excessively high voltage signal is sent to ECM through the heated oxygen sensor 2 heater.)
		Diagnosis delay time	--
P0057	HO2S2 HTR (B2) (HO2S heater control circuit low bank 2 sensor 2)	Diagnosis condition	--
		Signal (terminal)	Heated oxygen sensor 2 heater (bank 2) signal
		Threshold	The current amperage in the heated oxygen sensor 2 heater circuit is out of the normal range. (An excessively low voltage signal is sent to ECM through the heated oxygen sensor 2 heater.) ECM detects the heated oxygen sensor 2 heater circuit is short to ground.
		Diagnosis delay time	--
P0058	HO2S2 HTR (B2) (HO2S heater control circuit high bank 2 sensor 2)	Diagnosis condition	--
		Signal (terminal)	Heated oxygen sensor 2 heater (bank 2) signal
		Threshold	The current amperage in the heated oxygen sensor 2 heater circuit is out of the normal range. (An excessively high voltage signal is sent to ECM through the heated oxygen sensor 2 heater.)
		Diagnosis delay time	--