P2009: Intake manifold runner control circuit low (bank 1)
The ECU sees too low a voltage in the circuit that moves the intake runner flaps. Usually a wire shorted to earth, the connector or the actuator.
| Code | P2009 |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
| Can you keep driving? | Yes, no rush |
What P2009 means
The ECU drives the intake manifold runner flap actuator and monitors the voltage in that circuit. A low signal means the control wire is shorted to earth or the actuator has an internal short. The flaps stop moving as they should.
Most common causes
- Control wire chafed and touching earth
- Actuator connector with moisture or corrosion
- Actuator or solenoid with an internal short
- Engine ECU fault (rare)
Symptoms
- Engine warning light on
- Slight loss of power in some rev ranges
- Sometimes no symptoms
Can you drive with P2009?
Yes, no rush You can drive normally and fix it without rushing, even if the engine performs slightly less well.
Open the bonnetthe in-depth explanation
How to check it
Follow the wiring to the actuator looking for chafing against the engine or manifold. If the connector shows moisture or green corrosion, clean it, clear the code and see whether it returns.
How to read and clear P2009 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2009 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2005 Intake manifold runner control stuck open (bank 2)
- P2006 Intake manifold runner control stuck closed (bank 1)
- P2007 Intake manifold runner control stuck closed (bank 2)
- P2008 Intake manifold runner control circuit open or faulty (bank 1)
- P200A The intake manifold flaps are not performing as expected
- P200B The intake manifold runners on bank 2 are not working properly
- P200C The diesel particulate filter (bank 1) is getting too hot
- P200D The diesel particulate filter (bank 2) is getting too hot
- P2002 Diesel particulate filter efficiency below threshold (bank 1)
- P2003 Diesel particulate filter efficiency below threshold (bank 2)
- P2004 Intake manifold runner control stuck open (bank 1)
- P2015 Intake runner position sensor: range or performance problem (bank 1)
What does code P2009 mean?
The ECU drives the intake manifold runner flap actuator and monitors the voltage in that circuit. A low signal means the control wire is shorted to earth or the actuator has an internal short. The flaps stop moving as they should.
Can you drive with P2009?
You can drive normally and fix it without rushing, even if the engine performs slightly less well.
How do you clear P2009?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2009 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
