P2012

Intake Manifold Runner Control Circuit Low Bank 2

Q: 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.

Q: Can I just clear P2012?

It returns until the runner actuator or its wiring is repaired. Clearing alone won't restore proper runner control.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P2012 scans

P1876in 98.2% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2012 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX