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Engine-Codes – Generic – P2012

P2012 Code - Intake Manifold Runner Control Circuit Low Bank 2

Quick Answer

The diagnostic trouble code P2012 indicates a problem with the Intake Manifold Runner Control (IMRC) Circuit on Bank 2 of the engine. Common causes include Faulty IMRC Actuator: The intake manifold runner control actuator on Bank 2 may be malfunctioning, causing low voltage signals, Wiring Issues: Damaged or corroded wiring connecting the IMRC actuator to the ECM can disrupt the voltage signal, ECM Malfunction: A problem with the engine control module (ECM) can prevent proper communication with the IMRC system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2012 indicates Intake Manifold Runner Control Circuit Low Bank 2.
Common causes
Common causes include Faulty IMRC Actuator: The intake manifold runner control actuator on Bank 2 may be malfunctioning, causing low voltage signals, Wiring Issues: Damaged or corroded wiring connecting the IMRC actuator to the ECM can disrupt the voltage signal, ECM Malfunction: A problem with the engine control module (ECM) can prevent proper communication with the IMRC system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P2012 Description

The diagnostic trouble code P2012 indicates a problem with the Intake Manifold Runner Control (IMRC) Circuit on Bank 2 of the engine. The intake manifold runner control is a system that controls the amount of air entering the engine through the intake manifold runners. These runners are responsible for distributing air evenly to each cylinder for combustion. The IMRC system typically consists of butterfly valves that open and close to adjust the length of the intake runners, optimizing airflow at different engine speeds.

OBDII Code P2012 - Intake Manifold Runner Control Circuit Low Bank 2
P2012 Code - Intake Manifold Runner Control Circuit Low Bank 2

Common Causes of P2012

  1. Faulty IMRC Actuator: The intake manifold runner control actuator on Bank 2 may be malfunctioning, causing low voltage signals.
  2. Wiring Issues: Damaged or corroded wiring connecting the IMRC actuator to the ECM can disrupt the voltage signal.
  3. ECM Malfunction: A problem with the engine control module (ECM) can prevent proper communication with the IMRC system.
  4. Vacuum Leaks: Leaks in the intake manifold or vacuum lines can affect the IMRC system's operation.
  5. Carbon Buildup: Accumulated carbon deposits in the intake manifold can interfere with the movement of the intake manifold runner control.

Symptoms of P2012

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Reduced Engine Performance: The engine may experience a decrease in power and acceleration due to improper air intake control.
  3. Rough Idle: The engine may idle roughly or inconsistently, causing vibrations or shaking.
  4. Poor Fuel Economy: The vehicle may consume more fuel than usual due to inefficient air intake.
  5. Engine Stalling: In severe cases, the engine may stall or have difficulty starting.

How to Fix P2012

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the IMRC system components.
  2. Test IMRC Actuator: Check the operation of the intake manifold runner control actuator on Bank 2 to determine if it is functioning correctly.
  3. Inspect Wiring and Connections: Verify the integrity of the wiring harnesses and connections related to the IMRC circuit, repairing any damaged or corroded parts.
  4. Clean Intake Manifold: Remove any carbon buildup or debris from the intake manifold and IMRC components to ensure proper functionality.
  5. Replace Faulty Components: If the IMRC actuator or ECM is found to be faulty, replace them with new parts to resolve the issue.

Cost to Fix P2012

The cost of repairing the Intake Manifold Runner Control Circuit Low on Bank 2 can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost can be estimated to be between $200 and $800. However, it's important to note that actual repair costs may differ based on the vehicle's location, the rates of the auto repair shop, and the extent of the repairs needed. Make sure to consult with a professional technician for a more accurate cost estimate.

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Code P2012 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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