P2006 on Mazda: How to Diagnose & Fix
Intake Manifold Runner Control Stuck Closed (Bank 1)
1 Mazda model · 1 documented issue · $150-$600 repair
P2006 on Mazda by model: symptoms, diagnosis and fix
The naturally aspirated 2.5L L5-VE fitted to the CX-7 from 2010 uses a variable tumble / intake manifold runner system: a vacuum-or-solenoid-driven actuator swings a shaft that closes flaps in the intake runners at low load. The plastic clip that the actuator arm pushes against snaps off the shaft. With the clip gone the actuator strokes freely, the runner shaft never moves, the position sensor never sees the commanded change, and the ECU sets P2006 - 'intake manifold runner stuck closed'. Owners chase this for weeks because every electrical test passes: the solenoid is good, the wiring is good, the vacuum lines hold. One CX-7 owner methodically tested the tumble solenoid, the vacuum lines and the ground circuits before another member pointed to a broken plastic clip on the end of the runner rod, calling it 'very common, very bad engineering design by Mazda.' This is specific to the 2.5L non-turbo body - it is not a 2.3 DISI turbo failure.
Common Symptoms
- Check engine light with P2006
- Slightly rough or uneven idle
- Reduced low-end response
- Code returns after replacing the tumble solenoid
- Emissions test failure
How to Fix
Before buying a solenoid, pull the engine cover and watch the runner shaft while the actuator is commanded - if the arm moves and the shaft does not, the plastic drive clip is broken. There are three repair routes: replace the intake manifold runner control assembly (dealer route, the expensive one), or, as forum members suggest, bend the actuator/sensor arm outward so it once again contacts the flap rod, or weld a small extension onto the bar so the actuator engages it. Replacing the variable tumble solenoid alone will not clear the code when the clip is the cause. No recall or extended warranty covers this; expect roughly $150-$600 depending on whether the manifold assembly is replaced or the linkage is repaired.
Sources for this issue (2)
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 Mazda?
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 Mazda it is documented across 1 model: CX-7.
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 Mazda?
Published repair estimates on Mazda range from $150 to $600 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.