Ford DTC Code: P2008
Code Meaning: Intake Manifold Runner Circuit Open, Bank 1
- Engine may have a rough idle
- Engine may surge at times
- Reduction in low end torque
This is a soft code, so it may come and go as the ECM detects the fault. When the fault corrects itself, the light goes off — as opposed to hard codes that need to be erased to go away.
What Does the Code Mean?
This code is a generic powertrain code that applies to 1996-newer Fords. It refers to a fault occurring in a set of air control flaps which are positioned inside the intake manifold. The flaps are made to offer a certain amount of turbulence inside the intake manifold — which is transformed into a swirling effect. The swirling of the intake improves the quality of the intake air fuel mixture — improving low end torque and maintaining overall performance.
The ECM controls the position of the swirl flaps via an intake manifold runner control solenoid valve after reading signals from the MAF and barometric pressure sensor. When the ECM knows where to position the flaps, it will use pulse width modulation to control the intake runner control solenoid.
There are several things that may cause a fault in this process, the biggest concern being the swirl flaps since they are inside the intake.
The intake runner control solenoid is almost always the problem when this code appears. They are positioned over heat and dirt so it causes them to fail quickly. Otherwise, suspects include:
- MAF or EGR failure, although those usually throw other codes in addition to P2008
- Broken vacuum lines
- Poor electrical connection
- Open or short in wiring harness
Diagnosing and Repairing Associated Issues
A scan tool will be the most conclusive in diagnosis, but you can check a few things until you get a chance to scan:
- Check the vacuum hoses for cracks and make sure they are secured in place
- Inspect connectors on the solenoid — look for corrosion or loose connections
Other tests must be performed using a specific scan tool, usually found only at dealerships — so if you cannot pinpoint the problem, visit your local Ford certified mechanic for help.