DTC P2004: Intake Manifold Runner Control Stuck Open (Bank 1); DTC P2006: Intake Manifold Runner Control Stuck Closed (Bank 1) [04/2013 - 08/2015]: Description

WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

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.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P2004	Intake Manifold Runner Control Stuck Open (Bank 1)	The swirl control valve opening angle is 20°CA or more after requesting the swirl control valve to fully close (2 trip detection logic).	Open or short in intake air control valve actuator (for swirl control valve) circuit Intake air control valve actuator (for swirl control valve) Intake manifold Swirl control valve position sensor ECM	Comes on	DTC stored
P2006	Intake Manifold Runner Control Stuck Closed (Bank 1)	The swirl control valve opening angle is less than 35°CA after requesting the swirl control valve to fully open (2 trip detection logic).	Open or short in intake air control valve actuator (for swirl control valve) circuit Intake air control valve actuator (for swirl control valve) Intake manifold Swirl control valve position sensor ECM	Comes on	DTC stored

HINT:

When P2004 and/or P2006 is output, use the Techstream to confirm IAC Sensor Voltage (swirl control sensor output voltage) while performing Control the SCV Duty Ratio of the Active Test.

REFERENCE (NORMAL CONDITION: WHEN ENGINE WARMED UP)

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