P2006 on Subaru: How to Diagnose & Fix
Intake Manifold Runner Control Stuck Closed (Bank 1)
1 Subaru model · 1 documented issue · $350-$1,200 repair
P2006 on Subaru by model: symptoms, diagnosis and fix
Turbo WRX intake manifolds carry tumble generator valves — butterfly plates in each runner driven by a small electric actuator with a position sensor. The original valve shaft material corrodes from EGR/condensation and binds, or the actuator motor/sensor fails, and the ECU logs TGV stuck-open/stuck-closed codes (P2004-P2007, sometimes P2016/P2017 position sensor codes). The car goes into a reduced-power mode. Subaru acknowledged the shaft corrosion in TSB 02-182-19 and revised the shaft material. It affects both the EJ255 (2008-2014) and FA20DIT (2015-2021) WRX, with separate part numbers per engine.
Common Symptoms
- Check engine light with P2004-P2007
- Significant loss of power / limp mode
- Rough idle
- Intermittent code that returns after clearing
How to Fix
Confirm by disconnecting the actuator and rotating the valve by hand — a gritty or stuck shaft means the TGV assembly is seized. Replace the affected TGV assembly with the revised-shaft part (Subaru does not sell the motor or sensor separately). Some owners delete TGVs with aftermarket housings, which requires a tune. Out of warranty there is no free remedy; the TSB is a diagnostic aid, not a campaign.
Sources for this issue (3)
P2006 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2006 mean on a Subaru?
P2006 stands for "Intake Manifold Runner Control Stuck Closed (Bank 1)." This code means the intake manifold runner control on Bank 1 is stuck in the closed position. Many engines use small flaps inside the intake manifold that open and close to optimize airflow for low-speed torque versus high-speed power, and an actuator moves them while a position sensor confirms their movement. When the computer commands the runners open but they stay closed (or the feedback says they're stuck), it sets this code. You may notice rough idle, hesitation, reduced power at higher RPM, or lower fuel economy. On Subaru it is documented across 1 model: WRX.
What are the most common causes of P2006?
The most common causes of P2006 are: Carbon buildup jamming the intake runner flaps, Failed intake manifold runner control actuator/motor, Stuck or broken runner flap linkage or flaps, Faulty runner position sensor, Disconnected or leaking vacuum line (vacuum-actuated systems), Damaged or corroded actuator wiring/connector, Failed intake manifold (warped or broken internal components). The specific cause varies by vehicle.
How much does it cost to fix P2006 on a Subaru?
Published repair estimates on Subaru range from $350 to $1,200 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P2006 on a different make?
View P2006 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.