The P2006 diagnostic trouble code means the powertrain control module (PCM) has detected that the intake manifold runner control (IMRC) system is stuck in the closed position on bank 1. This prevents the engine from adjusting airflow as designed under different operating conditions.
This code is set when the PCM commands the intake flaps to open and the feedback sensor in the actuator and the current load indicates that the butterflies are stuck in their bores or some similar issue.
P2006 is defined as “Intake Manifold Runner Control Stuck Closed (Bank 1).” Bank 1 refers to the side of the engine that contains cylinder number one.
The intake manifold runner control system adjusts airflow by opening or closing internal flaps or valves inside the intake manifold. When the PCM commands the runners to open but detects they remain closed, it sets the P2006 code.
The IMRC system is designed to optimize airflow into the engine. At lower engine speeds, the runners may stay closed to improve torque. At higher speeds, they open to increase airflow and power.
If the runners fail to move as commanded, airflow is restricted, which can reduce engine efficiency and performance.
Drivers may notice the following symptoms:
In some cases, symptoms may be mild and only noticeable under heavy acceleration.
Possible causes of a P2006 code include:
P2006 is typically not an emergency, but it should not be ignored. Prolonged restricted airflow can reduce performance and fuel economy and may lead to additional engine issues over time.
Addressing the problem early can help prevent more extensive repairs.
If access to the intake manifold or actuator is limited, professional diagnosis may be required.
The correct fix depends on confirming the underlying cause.
After completing repairs, clear the code using a scan tool. Test-drive the vehicle and verify that the check engine light does not return and engine performance is restored.
Bank 1 refers to the side of the engine that contains cylinder number one.
Yes. If the runners stay closed, airflow is restricted, which can reduce power and acceleration.
No. These codes all relate to the intake manifold runner system but indicate different positions or faults.
Yes. Carbon deposits inside the intake manifold can prevent the runners from moving freely.
It can. Improper airflow can reduce engine efficiency and increase fuel consumption.
The vehicle often remains drivable, but performance issues may worsen if the problem is not fixed.
No. Some cases only require actuator, linkage, or vacuum repairs rather than replacing the entire manifold.
P2006 is a generic OBD-II code, though system design and repair steps vary by vehicle.
If diagnosing the IMRC system requires removing major engine components or using advanced diagnostic tools, professional service is recommended. A qualified technician can confirm the cause and ensure the intake system operates correctly.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.