P2006: Intake Manifold Runner Control Stuck Closed (Bank 1)
Key takeaways
- P2006 means the flaps or valves inside the intake manifold on bank 1 stayed closed when the computer commanded them open.
- It's usually safe to drive; the typical symptom is an engine that feels flat at higher rpm, not engine damage.
- Carbon-seized valve shafts, a failed actuator or a cracked vacuum hose cause it far more often than the computer does.
- On many engines the runner valves are built into the manifold, which is why the expensive fix reaches $1,500.
- An Audi bulletin for 2021–2024 A3 through Q7 models covers the N316 electric changeover valve for P2004, P2006, P2014 and P2015.
What P2006 means
The flaps inside your intake manifold are staying closed when the computer tells them to open. Scanners call it Intake Manifold Runner Control Stuck Closed (Bank 1). Many engines have runner, tumble or swirl valves in the intake: at low rpm they close so the incoming air swirls or takes a longer path, which helps torque and clean burning, and at higher rpm they open so the engine can breathe. An electric or vacuum actuator moves them, and most cars have a position sensor that reports where they are. When the computer commands them open but the sensor, or its own airflow checks, says they’re still closed, it sets P2006. Bank 1 is the side of the engine with cylinder 1; four-cylinder engines only have bank 1.
Is it safe to drive?
Yes, in most cases. With the runners stuck closed, the engine drives normally around town but feels flat when you rev it: slower passing, weaker merging, and sometimes slightly worse fuel economy on the highway. It won’t hurt the engine on its own. The answer changes if you hear rattling from the intake, the engine starts misfiring, or it hesitates badly. On some engines a flap or its screw can break loose and get pulled into a cylinder, so stop and have it checked.
Causes, ranked
| Cause | How you confirm it | Typical cost (US independent shop, 2026) |
|---|---|---|
| Valves seized with carbon, or a broken linkage | Actuator tries to move but the shaft doesn’t; shaft stiff by hand; link popped off | $150–$500 for linkage; $600–$1,500 if the manifold must be replaced |
| Actuator or control valve failed | Actuator doesn’t move when commanded with a scan tool, with good power, ground and vacuum | $150–$500 |
| Cracked or disconnected vacuum hose (vacuum-operated systems) | Actuator rod doesn’t move with the engine running; hose split or off; smoke test finds it | $50–$400 |
| Position sensor or its wiring | Reading doesn’t change while the valves visibly move; open or shorted wire | $100–$250 for wiring; sensor often requires removing the manifold |
| Intake manifold with built-in valves | Valves or sensor aren’t sold separately for your engine | $600–$1,500 |
What to check first
- Watch the actuator move. With the engine running or with a scan tool command, the rod or arm should swing when the valves are commanded. No movement narrows it to the actuator, its vacuum or its wiring.
- Check the linkage and shaft. If the actuator moves but the shaft doesn’t, or the shaft is stiff by hand, it’s mechanical, and on direct-injection engines carbon is the usual reason.
- Check the vacuum hose and connector. A split hose or a corroded plug is the cheapest fix.
- Compare the position sensor reading with what the valves are actually doing before condemning the manifold.
- Clear it and drive. After a hose, connector or linkage repair, clear the code and drive; it should stay off.
The one bulletin in NHTSA’s files is from Audi: it gives diagnosis information for the N316 electric changeover valve on 2021–2024 A3, A4, A5, A6, Q3, Q5, Q7 and S3 models, covering P2004, P2006, P2014 and P2015 together.
What it costs
The cheap outcome is a vacuum hose or connector, about $50, up to $400 if it’s under other parts. The common outcome is an actuator or linkage at $150–$500. The expensive outcome is a new intake manifold with the valves built in, $600–$1,500. Watching the actuator during a $100–$180 diagnosis tells the shop which of those you need before anything is ordered.
Related codes
P2004 is the opposite fault, runners stuck open, and P2007 is P2006 on bank 2. Position sensor codes like P2014 and P2015 often set with it, because a seized flap also confuses the sensor. For what else the light could mean, see check engine light on.
What owners report to NHTSA
5 complaints filed with NHTSA mention P2006, 5 of them since 2015, across 4 different models. The component owners most often filed it under: vehicle speed control.
Manufacturer service bulletins that name P2006
1 technical service bulletins and manufacturer communications filed with NHTSA mention P2006, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- AUDI A4 (2021, 2022, 2023, 2024), bulletin 11005854: This bulletin provides information when the MIL is on; electric changeover valve N316 - P2004, P2006, P2014, P2015.
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.
Frequently asked questions
Can I drive with a P2006 code?
Usually yes. With the runners stuck closed the engine keeps its low-speed pull but runs out of breath at higher rpm, so passing and highway merging feel weaker. Stop and get it checked if you hear rattling from the intake or the engine starts misfiring.
What's the difference between P2004 and P2006?
They're opposite faults on the same part. P2004 means the runners are stuck open, P2006 means they're stuck closed. Both are bank 1; P2005 and P2007 are the bank 2 versions on V engines.
Can carbon cause P2006?
Yes, especially on direct-injection engines. Oil vapor from the crankcase ventilation bakes onto the valve shafts and flaps until the actuator can't turn them. Sometimes a cleaning frees them; often the manifold is replaced because the shafts are worn too.
Will clearing P2006 make it go away?
Only until the next time the computer commands the runners open and checks them, usually within a drive or two. It's worth clearing after a hose or connector fix to confirm the repair, not as a repair on its own.