DTC P0011 Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0012 Camshaft Position "A" - Timing Over-Retarded (Bank 1); DTC P0021 Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2); DTC P0022 Camshaft Position "A" - Timing Over-Retarded (Bank 2): Description
The Variable Valve Timing (VVT) system controls the intake camshaft to provide the optimal valve timing for every driving condition. This control is performed based on signals regarding as intake air volume, throttle position and engine coolant temperature.
The ECM controls the Oil Control Valve (OCV) based on the signals output from several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. As a result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, and exhaust emissions decrease under overall driving conditions. Also, the ECM detects the actual valve timing using the signals from the camshaft position sensor and the crankshaft position sensor, and performs feedback control. This is how target valve timing is achieved by the ECM.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0011 P0021 |
Advanced cam timing: After engine is warmed up and engine speed is at 400 to 4,000 rpm, condition (a) or (b) continues (1 trip detection logic):
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| P0012 P0022 |
Retarded cam timing: After engine is warmed up and engine speed is at 400 to 4,000 rpm, condition (a) or (b) continues (2 trip detection logic):
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