DTC P0077-00: Intake Valve Control Solenoid Circuit High: General Description

The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the camshaft. This system controls the camshaft to provide the optimal valve timing for every driving condition. The ECM controls the Oil Control Valve (OCV), based on the signals output from mass air flow, throttle position and engine coolant temperature. The CVVT controller regulates the camshaft angle using oil pressure through the OCV. As result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease under over all driving conditions.