DTC P0014: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1); DTC P0015: Camshaft Position "B" - Timing Over-Retarded (Bank 1): Description
HINT:
If DTC P0014 or P0015 is output, check the VVT (Variable Valve Timing) system.
The Variable Valve Timing (VVT) system includes the ECM, camshaft timing oil control valve and VVT controller. The ECM sends a target duty cycle control signal to the camshaft timing oil control valve. 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 camshaft timing oil control valve based on the signals transmitted by several sensors. The VVT controller regulates the exhaust camshaft angle using oil pressure through the camshaft timing oil control valve. 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.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0014 | Exhaust valve timing is stuck at a certain value when in the advance range (2 trip detection logic). |
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| P0015 | Exhaust valve timing is stuck at a certain value when in the retard range (1 trip detection logic). |
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