P2008: Intake Manifold Runner Control Circuit/Open (Bank 1)

P2008 means the ECU has detected an open circuit in the wiring to the intake manifold runner control actuator. Unlike P2004 or P2006, which indicate the flaps are physically stuck, P2008 specifically points to an electrical problem preventing the ECU from controlling the actuator.

P2008 is a electrical-related diagnostic trouble code classified as moderate severity. When your vehicle's ECU detects this condition, it stores P2008 and illuminates the check engine light.

If your vehicle has triggered P2008, you may notice one or more of these symptoms:

• Check engine light illuminated
• Reduced engine performance at certain RPM ranges
• Rough or slightly unstable idle
• Intake manifold flaps not responding to actuator commands
• Possible whistling noise from intake area
• Slightly increased fuel consumption

Here are the most common causes of P2008, ranked by how likely they are to be the culprit:

Generally yes, for short-term driving. Safe for short-term driving. The intake flaps will default to one position, reducing either low-end or high-end performance. Have the electrical circuit diagnosed within a few weeks.

Follow these steps to pinpoint the root cause of P2008:

1. Locate the intake manifold runner control actuator on the intake manifold. Check that the electrical connector is firmly seated and not disconnected or damaged.
2. Inspect the connector pins for corrosion, green oxidation, or bent pins. Clean with electrical contact cleaner and apply dielectric grease to prevent future corrosion.
3. Measure the actuator motor resistance through the connector (disconnect from harness first). A reading of OL (open line/infinity) confirms an internal open circuit in the motor.
4. If the motor resistance is within specification, check the wiring between the ECU and the actuator. Use a continuity test on each wire. Look for chafing where the harness passes near hot engine components.
5. Check the relevant fuse in the engine bay fuse box. Consult the vehicle's fuse diagram for the intake manifold runner control circuit.

Repair costs for P2008 vary depending on the root cause and your vehicle. Here are typical estimates:

P2008 behaves differently depending on your vehicle. Select your car below for model-specific causes, known issues, and adjusted cost estimates:

These codes are often seen alongside P2008 or indicate related issues: