The intake manifold runner control (IMRC) system plays a crucial role in managing engine airflow. It helps improve engine performance and efficiency through the opening and closing of the butterfly valves in the intake manifold. When a vehicle’s primary computer detects a problem in this system, one of the trouble codes it may set is the P2006 code.
Each automaker may have a unique and complex IMRC system design, which means that the steps for testing and clearing this trouble code vary between different makes and models. Here is a guide about code P2006 to give you a basic understanding of this trouble code.
What Does the P2006 Code Mean?
Diagnostic trouble code (DTC) P2006 stands for “Intake Manifold Runner Control Stuck Closed (Bank 1).” It is logged when the powertrain control module or PCM directs the IMRC to open, but detects that the IMRC actuator for engine bank 1 is stuck in the closed position.
The PCM controls the operation of the intake manifold runner control (IMRC) system. It is made up of butterfly-shaped flaps that fit into the intake manifold runner. An electronic runner control solenoid opens and closes these flaps in order to fine tune air flow to the intake manifold.
Since these flaps are connected and opened with one motion, a problem arises when one of these flaps is stuck or binding. In some models, it may take multiple ignition cycles with a detected IMRC failure before the Check Engine Light is illuminated.
Note: The definition of code P2006 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
What are the Possible Causes of the P2006 Code?
- Intake manifold runner control actuator failure
- Bad intake manifold runner position sensor
- Open or shorted wiring in the IMRC actuator solenoid control circuit
- Carbon buildup on the IMRC flaps or intake manifold ports
- Faulty MAP Sensor
- Restricted vacuum lines
- PCM failure
What are the Common Symptoms of the P2006 Code?
- Check Engine Light is on
- Hesitation upon acceleration
- Rough or fluctuating idle
- Rich exhaust
- Diminished fuel efficiency
- Engine surge
How to Diagnose the P2006 Code
Identifying the underlying cause of the P2006 code can be difficult, especially if you’re not confident with your automotive knowledge. In most cases, it would be best to bring your vehicle to an auto repair shop and seek the help of a professional for an accurate diagnosis.
Here is a video that can help give you a better idea on how this trouble code may be diagnosed:
How to Fix the P2006 Code
The P2006 code is a generic trouble code that may apply to various makes and models. While vehicles from different manufacturers may share common symptoms, the steps for diagnosis and repair vary depending on the car. For instance, the troubleshooting process for a P2006 Ford code may differ from a Mazda’s repair process.
If you’re an advanced DIYer who’d like to fix this code on your own, it will be helpful to refer to your repair manual or get factory vehicle repair information from an online subscription service.