P2012
Intake Manifold Runner Control Circuit Low (Bank 2)
The IMRC actuator drive line on bank 2 reads below the expected voltage threshold — typically a short to ground or a stuck-low driver inside the control module.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Short to ground in driver lineCommon
- Actuator winding shorted internallyPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- IMRC Actuator
- Intake Manifold Runner Harness
P2012 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.