P2009
Intake Manifold Runner Control Solenoid Circuit Low (Bank 1)
The IMRC solenoid drive line for bank 1 reads below the lower threshold — short to ground or a failed driver stage. The runner cannot be switched on demand.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Drive line shorted to groundCommon
- Solenoid internally shortedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- IMRC Solenoid
- IMRC Wiring
P2009 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.