Intake Manifold Runner Control Circuit Low Bank 1

What does P2009 mean?

P2009 stands for Intake Manifold Runner Control Circuit Low Bank 1. The engine computer has found a problem with how fuel and air are measured or mixed. This affects fuel economy, emissions and sometimes how smoothly the engine runs.

Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.

Common causes

• Vacuum or intake air leaks
• Dirty or faulty mass airflow (MAF) sensor
• Faulty oxygen sensor or its wiring
• Fuel pressure problems (pump, filter or regulator)
• Clogged or leaking fuel injectors

What to do

1. Read all stored and pending codes with a scanner. Several codes together often point to one cause.
2. Note the freeze frame data (speed, temperature, load) recorded when the code was set.
3. Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
4. Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.

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Frequently asked questions

What does P2009 mean?

P2009 means “Intake Manifold Runner Control Circuit Low Bank 1”. It belongs to the fuel and air metering group: The engine computer has found a problem with how fuel and air are measured or mixed. This affects fuel economy, emissions and sometimes how smoothly the engine runs.

Is it safe to drive with P2009?

You can usually drive carefully for a short time, but fix it soon to avoid further damage or higher fuel use.

How do I clear P2009?

Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.

Related codes

• P2005Intake Manifold Runner Control Stuck Open Bank 2
• P2006Intake Manifold Runner Control Stuck Closed Bank 1
• P2007Intake Manifold Runner Control Stuck Closed Bank 2
• P2008Intake Manifold Runner Control Circuit/Open Bank 1
• P200AIntake Manifold Runner Performance Bank 1
• P200BIntake Manifold Runner Performance Bank 2
• P200CDiesel Particulate Filter Over Temperature Bank 1
• P200DDiesel Particulate Filter Over Temperature Bank 2

Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.