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Engine-Codes – Generic – P2004

P2004 Code - Intake Manifold Runner Control Stuck Open Bank 1

Quick Answer

The diagnostic trouble code P2004 indicates that the Intake Manifold Runner Control (IMRC) is stuck open on Bank 1. Common causes include Carbon buildup in the IMRC system, Faulty IMRC actuator motor, Broken linkage connecting 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
P2004 indicates Intake Manifold Runner Control Stuck Open Bank 1.
Common causes
Common causes include Carbon buildup in the IMRC system, Faulty IMRC actuator motor, Broken linkage connecting 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 Aug 25, 2024
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Code P2004 Description

The diagnostic trouble code P2004 indicates that the Intake Manifold Runner Control (IMRC) is stuck open on Bank 1. The IMRC system is responsible for controlling airflow within the intake manifold, optimizing performance and efficiency at different engine speeds. When the control is stuck open, it can lead to a variety of issues affecting the vehicle's performance. This can result in poor acceleration, reduced power output, rough idling, decreased fuel efficiency, and even engine stalling in severe cases.

OBDII Code P2004 - Intake Manifold Runner Control Stuck Open Bank 1
P2004 Code - Intake Manifold Runner Control Stuck Open Bank 1

Common Causes of P2004

  1. Carbon buildup in the IMRC system
  2. Faulty IMRC actuator motor
  3. Broken linkage connecting the IMRC system
  4. Electrical issues such as wiring or sensor faults

Symptoms of P2004

  1. Decreased engine performance
  2. Rough idling or engine stalling
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated on the dashboard
  5. Lack of power when accelerating

How to Fix P2004

  1. Diagnose the issue using a scan tool to confirm the P2004 code and identify the specific cause.
  2. Inspect the IMRC actuator, linkage, and associated components for any damage or obstructions.
  3. Clean the intake manifold and IMRC system to remove any carbon buildup that may be causing the issue.
  4. Replace the faulty IMRC actuator motor or broken linkage if necessary.
  5. Clear the trouble code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2004

The typical repair costs for addressing a P2004 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of parts for this repair can range from $200 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for resolving an Intake Manifold Runner Control Stuck Open Bank 1 issue can fall within the $300 to $800 range. It's important to note that prices may vary based on the location, vehicle make and model, and the expertise of the repair shop.

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Code P2004 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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