DTC Detection Logic

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTC P1078 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to "DTC LOGIC ".

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