DTC P0014: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1); DTC P0015: Camshaft Position "B" - Timing Over-Retarded (Bank 1); DTC P0024: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2); DTC P0025: Camshaft Position "B" - Timing Over-Retarded (Bank 2) [08/2015 - 08/2018]: Description

HINT: 

If DTC P0014, P0015, P0024 or P0025 is present, check the VVT (Variable Valve Timing) system.

The Variable Valve Timing (VVT) system includes the ECM, OCV and VVT controller. The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT controller. 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 OCV based on the signals transmitted by several sensors. The VVT controller regulates the exhaust camshaft angle using oil pressure through the OCV. 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 camshaft and crankshaft position sensors, and performs feedback control. This is how the target exhaust valve timing is verified by the ECM.

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