DTC P0013: Camshaft Position "B" Actuator Circuit / Open (Bank 1); DTC P0023: Camshaft Position "B" Actuator Circuit / Open (Bank 2) [12/2015 - 08/2016]: Description

The Variable Valve Timing (VVT) system includes the ECM, camshaft timing oil control valve assembly (for exhaust side) and camshaft timing exhaust gear assembly. The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly (for exhaust side). This control signal regulates the oil pressure supplied to the camshaft timing exhaust gear assembly. Camshaft timing control is performed according to engine operating conditions such as the intake air volume, throttle valve position and engine coolant temperature. The ECM controls the camshaft timing oil control valve assembly (for exhaust side), based on the signals transmitted by several sensors. The camshaft timing exhaust gear assembly regulates the exhaust camshaft angle using oil pressure through the camshaft timing oil control valve assembly (for exhaust side). As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual exhaust valve timing using signals from the VVT sensor and crankshaft position sensor, and performs feedback control. This is how the target intake valve timing is verified by the ECM.

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