DTC P1078, P1084: EVT Control Position Sensor: Description
Exhaust valve timing control position sensor detects the protrusion of the signal plate installed to the exhaust camshaft front end. This sensor signal is used for sensing a position of the exhaust camshaft.
This sensor uses a Hall IC.
Based on the position of the exhaust camshaft, ECM controls exhaust valve timing control solenoid valve to optimize the shut/open timing of exhaust valve for the driving condition.