DTC Detection Logic

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTC P1078 or P1084 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to "DTC LOGIC ".

DTC DETECTION CONDITION CHART

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P1078	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 (The sensor circuit is open or shorted.) Exhaust valve timing (EVT) control position sensor Camshaft (EXH) Accumulation of debris to the signal pick-up portion of the camshaft
P1084	Exhaust valve timing control position sensor (bank 2) circuit