DTC P2004: Intake Manifold Runner Control Stuck Open (Bank 1); DTC P2006: Intake Manifold Runner Control Stuck Closed (Bank 1): Description

The Swirl Control Valves (SCV) are built into the intake manifold. The swirl control valves use a position sensor and a DC motor. A swirl control valve is located at one side of each pair of independent intake ports. Depending on signals from the ECM, the DC motor opens and closes the swirl control valves. The position sensor detects the opening angle of the swirl control valves. When the swirl control valves close, the velocity of the intake air flow that passes through the port on the other side of the independent intake port will become faster, enhancing lateral turbulent flow in the combustion chamber. As a result, when engine coolant temperature is low, atomization of fuel will be enhanced, stabilizing combustion in the cylinder. Also fuel consumption is decreased due to increased combustion efficiency when the engine is running at a low speed with a light load.

DTC No.	DTC Detection Condition	Trouble Area
P2004	The swirl control valve opening angle is 20°CA or more after requesting the swirl control valve full close (2 trip detection logic)	Intake air control valve actuator for swirl control valve circuit Intake manifold (intake air control valve actuator for swirl control valve) Swirl control valve position sensor Swirl control valve ECM
P2006	The swirl control valve opening angle is less than 35°CA after requesting the swirl control valve full open (2 trip detection logic)

HINT:

After confirming DTC P2004 or P2006, use the Techstream to confirm the IAC Sensor Voltage (swirl control valve position sensor output voltage) while performing Control the SCV Duty Ratio of the Active Test.

REFERENCE (NORMAL CONDITION)

Control the SCV Duty Ratio	IAC Sensor Voltage
100%	3.2 to 4.8 V
-100%	0.2 to 1.0 V