DTC Detection Logic

WARNING: This page is about a different car, the 2013 Infiniti M56. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.	Trouble diagnosis name (Trouble diagnosis content)	DTC detecting condition	Possible cause
P1078	EXH TIM SEN/CIRC-B1 [Exhaust valve timing control position sensor (bank 1) circuit]	An excessively high or low voltage from the sensor is sent to ECM.	Harness or connectors [Exhaust valve timing control position sensor (bank 1) circuit is open or shorted) Exhaust valve timing control position sensor (bank 1) Crankshaft position sensor Camshaft position sensor (bank 1) Accumulation of debris to the signal pick-up portion of the camshaft
P1084	EXH TIM SEN/CIRC-B2 [Exhaust valve timing control position sensor (bank 2) circuit]		Harness or connectors [Exhaust valve timing control position sensor (bank 2) circuit is open or shorted) Exhaust valve timing control position sensor (bank 2) Crankshaft position sensor Camshaft position sensor (bank 2) Accumulation of debris to the signal pick-up portion of the camshaft