DTC Detection Logic

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

An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve.

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0078	EX V/T ACT/CIRC-B1 [Exhaust valve timing control solenoid valve (bank 1) circuit]	Diagnosis condition	Start engine and let it idle
		Signal (terminal)	Voltage signal transmitted from exhaust valve timing control solenoid valve to ECM
		Threshold	An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve
		Diagnosis delay time	-
P0084	EX V/T ACT/CIRC-B2 [Exhaust valve timing control solenoid valve (bank 2) circuit]	Diagnosis condition	Start engine and let it idle
		Signal (terminal)	Voltage signal transmitted from exhaust valve timing control solenoid valve to ECM
		Threshold	An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve
		Diagnosis delay time	-