P206F: Intake Manifold Tuning (IMT) Valve Stuck Closed (Bank 2)

Here the bank 2 tuning valve ignores an open request: the engine computer asks it to swing to the open end stop, yet the feedback still shows the closed position. The code only makes sense on a V-engine with a separately switched flap per bank, and no manufacturer publishes it; GM and Ford describe a single valve and use P2071 for the stuck-closed case. GM counts that fault when the open position is missing after at least 5 s and sets it as Type B. Electrical faults in the drive circuit belong to P0663 and onward, position sensor faults on bank 2 to P207A to P207E. A flap jammed shut usually costs top-end power more than low-speed torque, so the car may feel flat at higher revs; P206E is the opposite direction.

Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.

Symptoms

• Engine feels flat at high rpm
• Check engine light (manufacturer-dependent)
• Barely noticeable at moderate driving

Most likely causes

• Bank 2 flap seized in its closed position by deposits or a dry shaft bearing
• Bank 2 actuator internally defective, no longer produces the opening torque
• On vacuum-operated designs a leaking hose or check valve leaves the actuator without vacuum
• Broken flap seal or foreign object blocking the flap travel

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the vacuum hoses and the connector
2. Use the scanner to command the movement and compare the actual position with the requested one.
3. Watch the actuator's movement with the scanner
4. Inspect the manifold for carbon buildup
5. Replace the actuator if it does not follow the command

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P206F means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 0: Subsystem depends on the code range
• 6F: Specific fault in that system

Frequently asked questions

Can I keep driving with code P206F?

You can drive in moderation. Get it repaired soon, because a loose flap can cause major damage on some engines.

What causes code P206F?

The most common causes are: bank 2 flap seized in its closed position by deposits or a dry shaft bearing; bank 2 actuator internally defective, no longer produces the opening torque; on vacuum-operated designs a leaking hose or check valve leaves the actuator without vacuum.

Related codes

• P206EIntake Manifold Tuning (IMT) Valve Stuck Open (Bank 2)
• P2071Intake Manifold Tuning (IMT) Valve Stuck Closed (Bank 1)
• P207AIntake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit (Bank 2)
• P0663Intake Manifold Tuning Valve Control Circuit/Open Bank 2
• P065FIntake Manifold Tuning Valve Performance Bank 2

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 15OBDG02 Engine Diagnostics
• en.wikipedia.org: Variable length intake manifold

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.