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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 at a glance
CodeP2009
SystemEngine and transmission
GroupP20xx, Emissions: catalysts and AdBlue
TypeGeneric: 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.

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 this same explanation and whether it’s confirmed, pending or permanent.

With Free you read this code with its short description for nothing, and clear it if the engine stores it over standard OBD. With Pro you get the full explanation, how the car was running when it was logged (revs, temperature, load) and clearing in every control unit.

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 the ITV. It’s all in how to read and clear fault codes and in the ITV and OBD.

Similar codes

P2009 is a generic code, so it means the same on any make, for example on Abarth, Citroën, Hyundai, Mini, Seat, Volvo. See what Final OBD does on your car in makes and models.

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.