P2012
Intake Manifold Runner Control Circuit Low Bank 2
Fuel & air metering
Generic OBD-II
Medium
What it means
P2012 means the PCM detected low voltage on the intake manifold runner control (IMRC) circuit for bank 2. These runners change intake airflow to optimize torque across the rpm range, so a fault can soften low-end power and slightly hurt economy. The engine still starts and runs — the usual cause is a wiring short, actuator, or connector problem.
Medium
Can I keep driving? Usually drivable — you may notice weaker low-end torque or slight roughness; fix it to keep performance and economy normal.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced low-rpm torque or sluggish acceleration
- Slightly rough running or hesitation in some rpm ranges
- Minor drop in fuel economy
Common causes
Most likely first
- Faulty intake manifold runner control (IMRC) actuator or solenoid on bank 2Likely
- Control-circuit wiring shorted to ground (low voltage)Common
- Corroded or loose IMRC connectorCommon
- Stuck or seized runner flaps / blocked vacuum linesLess often
- Failed PCM (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for companion runner codes (P2011, P2013).
- Inspect the IMRC actuator/solenoid connector and wiring for a short to ground.
- Confirm the runner flaps and any vacuum lines move freely and aren't stuck.
- Test the actuator/solenoid resistance against spec; replace if faulty. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2012?+
Generally yes. The engine starts and runs, though you may feel weaker low-end pull. Fixing it restores normal torque and economy.
Can I just clear P2012?+
It returns until the runner actuator or its wiring is repaired. Clearing alone won't restore proper runner control.
Related codes
Often seen with P2012
Read & clear P2012 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX