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DTC CODE DTC DETECTION CONDITION TROUBLE AREA P0011 P0021 Intake valve timing is not adjusted in valve timing advance range (1 trip detection logic) Valve timing OCV for intake camshaft OCV filter Intake camshaft timing gear ECM P0012 P0022 Intake valve timing is not adjusted in valve timing retard range (2 trip detection logic) Valve timing OCV for intake camshaft OCV filter Intake camshaft timing gear ECM MONITOR DESCRIPTION The ECM optimizes the intake valve timing using the VVT (Variable Valve Timing) system to control the intake camshaft. The VVT system includes the ECM, Oil Control Valve (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. The VVT controller can advance or retard the intake camshaft. If the difference between the target and actual intake valve timings is large, and changes in the actual intake valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and stores DTC(s). 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011,P0012... |