OBD-II Error Code P2004: Intake Manifold Runner Control Stuck Open B1 - How to Fix It

Q: Can I drive with a P2004 code?

Yes, but you may experience reduced low-end torque, poor fuel economy, and a rough idle. It's best to fix it promptly to avoid further issues.

Q: How much does it cost to fix P2004?

Costs vary: cleaning may be free (DIY), replacing the IMRC actuator can cost $100-$300 for parts and labor. Professional diagnosis may add $100-$150.

Q: What cars are most affected by P2004?

This code is common on vehicles with variable intake manifolds, such as some Ford, Chevy, Chrysler, and BMW models. Always check specific vehicle service information.

Q: Can a vacuum leak cause P2004?

Yes, a vacuum leak can prevent the IMRC actuator from operating correctly. Inspect all vacuum hoses connected to the actuator.

Q: What is bank 1?

Bank 1 is the side of the engine that contains cylinder #1. Typically, it is the side closest to the front of the engine.

Abstract

Error code P2004 means your car's engine control module (ECM) has detected that the intake manifold runner control (IMRC) on bank 1 is stuck in the open position. This reduces low-end torque and can cause rough idle, poor fuel economy, or reduced power. This guide will help you diagnose and fix the issue.