– Variable Valve Timing (VVT) sensor circuit is open or shorted
– Variable Valve Timing (VVT) sensor poor electrical connection
– Faulty Variable Valve Timing (VVT) sensor
– Damaged ECM
2005-2007 Toyota Camry
Toyota Camry Service Bulletin OBDII Code P0016
2007 Toyota Yaris
Toyota Yaris Service Bulletin OBDII Code P0016
– Lack/Loss of power
– Engine rough idle
The Engine Control Module (ECM) controls the Oil Control Valve (OCV) to regulate the intake camshaft angle. As a result of the angle change, the engine timing is advance or retard. Optimizing engine timing will help the engine improve torque and fuel economy, and the exhaust emissions decrease under overall driving conditions. The Variable Valve Timing (VVT) system includes the Oil Control Valve (OCV) and VVT controller. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control.