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Home / Codes / P2012
DTC code page

P2012: Intake Manifold Runner Control Circuit High (Bank 1)

Quick answer: The Bank 1 intake runner control circuit is staying higher than expected or is biased toward a high input.

Drivers also search this fault as intake manifold runner control circuit high bank 1, IMRC circuit high bank 1, bank 1 runner control high input.

Severity: medium Family: powertrain Related paths: 6
Meaning

What P2012 usually means

P2012 is the high-input side of the Bank 1 IMRC control circuit. Instead of the control line being dragged low, the PCM sees voltage staying higher than it should or not reacting to commands normally. This can come from a short to power, an open ground, actuator feedback issues, or wiring damage that leaves the circuit floating high.

Fast triage

Start here before chasing parts

  • Scan first: save freeze-frame and pending codes before clearing anything.
  • Confirm the complaint: compare the stored code with current drivability symptoms.
  • Use context: trims, live data, and related codes usually narrow the fault faster than guesswork.
  • Work simplest to hardest: leaks, connectors, maintenance items, and known patterns before expensive components.
Initial checks

What to check first

  • Inspect the Bank 1 harness for rubbed-through spots touching a power source.
  • Check grounds and connector fit before replacing expensive components.
  • Keep in mind that P2012 is electrical first, not simply a stuck-runner description.
Driving risk

Can you keep driving?

P2012 is usually driveable short-term, but Bank 1 runner control may be unreliable until the high-circuit fault is repaired.

Moderate urgency: This code often allows short-term driving, but the right fix usually comes faster when you diagnose it early instead of waiting for more codes.
Symptoms

Common symptoms

Likely causes

Common causes behind this code

  • Control circuit shorted to battery voltage
  • Lost ground or poor actuator grounding
  • Connector damage causing an unstable high signal
  • Actuator or sensor feedback issue holding the line high
  • PCM driver problem after the rest of the circuit is verified

Cause phrases often tied to this code: short to power, open ground, biased high signal, wiring fault, feedback issue.

Diagnostic order

Suggested workflow

  1. Measure circuit voltage and compare it to expected command behavior.
  2. Check for short-to-power and ground integrity problems.
  3. Inspect connector terminals and actuator condition.
  4. Repair the high-circuit cause and then verify runner function returns.
  5. Retest for stable Bank 1 control under the same conditions that set the code.
Avoid guesswork

Common mistakes

  • Replacing the intake manifold without finding the electrical high condition first.
  • Ignoring weak grounds that can make a control circuit float high.
  • Assuming a high-circuit code means the runner is physically stuck open.
Repair path

Practical fix guidance

  • Repair the short-to-power, ground problem, or failed control component proven by testing.
  • Verify harness routing and connector retention after repair.
  • Confirm the Bank 1 runner now tracks commands without a high-input fault returning.
Vehicle context

Affected brands in this MVP

Brand hubs help broaden internal linking now and can evolve into make-specific diagnostic notes later.

Aliases and common searches

English phrases tied to P2012

Useful when the driver knows the wording but not the exact DTC yet.

  • intake manifold runner control circuit high bank 1
  • IMRC circuit high bank 1
  • bank 1 runner control high input
Related search intent

Queries this page can answer naturally

  • P2012 code meaning
  • what does P2012 mean
  • intake manifold runner control circuit high bank 1
FAQ

Quick questions about P2012

What usually causes P2012?

Common causes include short-to-power wiring damage, poor grounds, and failed control components that bias the circuit high.

Can a bad ground really create a high-input code?

Yes. A floating or missing ground can leave the control line reading artificially high.

Is P2012 the opposite of P2009?

In a practical sense, yes. P2009 points low; P2012 points high on the Bank 1 control circuit.