P0011

DTC P0011 Camshaft Position "A" - Timing Over - Advanced or System Performance (Bank 1)

HINT: If DTC P0011 or P0012 is present, check the VVT (Variable Valve Timing) system.

CIRCUIT DESCRIPTION

DTC Detection Condition:

The Variable Valve Timing (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. Camshaft timing control is performed based on the engine operation condition such as the intake air volume, throttle position and engine coolant temperature. The ECM controls the OCV based on the signals from several sensors. The VVT controller regulates the intake camshaft angle using the oil pressure through the OCV As a result, the relative position between the camshaft and crankshaft is optimized, the engine torque and the fuel economy improve, and the exhaust emission drops. The ECM detects the actual valve timing using signals from the camshaft position sensor and crankshaft position sensor. The ECM performs feedback control and verifies target valve timing.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

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, the Oil Control Valve (OCV) and the 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 actual intake valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.

Example:
A DTC will be set when the following conditions 1), 2) and 3) are met:
1. The difference between the target and actual intake valve timings is more than 5° CA (Crankshaft Angle) and the condition continues for more than 4.5 seconds.
2. 1 second or more have elapsed to change the valve timing by 1° CA.
3. After above conditions 1) and 2) are met, the OCV is forcibly activated 63 times or more.

DTC P0011 (Advanced Cam Timing) is subject to 1 trip detection logic.
DTC P0012 (Retarded Cam Timing) is subject to 2 trip detection logic.
This DTC indicates that the VVT controller cannot operate properly due to OCV malfunction or the presence of foreign objects in the OCV.
The monitor runs if all the conditions below are met:
- After engine warm-up (engine coolant temperature 75 °C (167 °F) or more).
- After driving the vehicle over 64 km/h (40 mph) for 3 minutes.
- After idling the engine for 3 minutes.

Wiring Diagram:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

NOTE: DTC P0011 or P0012 may be set when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

Step 1:

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Hand-held tester:

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Step 10 - 12:

OBD II scan tool (excluding the hand-held tester):