P2004: Intake manifold runner control stuck open (Bank 1)
Drive carefully. Get it checked within a week or two.
Can I drive with P2004?
Yes, but drive carefully and get it checked soon. Intake swirl flaps are stuck open, slightly reducing low-end torque and acceleration.
What does P2004 mean?
P2004 stands for Intake Manifold Runner Control Stuck Open (Bank 1).
Symptoms you may notice
- Check engine light steadily illuminated
- Slight hesitation or change in throttle response
- Possible increase in fuel consumption
How much does it cost to fix?
Repair costs for code P2004 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Carbon buildup binding intake runner flaps
- Broken plastic runner control linkage arm
- Defective IMRC electric actuator or vacuum solenoid
- Vacuum leak to IMRC actuator
What to do next
- Inspect the plastic linkage rods on the side of the intake manifold for detachment.
- Check if the IMRC linkage moves freely by hand with engine off.
- Clean manifold carbon deposits or replace the runner control motor.
Last updated: October 2026
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General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P2004 means the manifold butterfly flaps that adjust intake runner length are stuck in the open position. You might feel a slight lack of low-speed pickup off idle, but high-speed highway passing is unaffected. The car is usually safe to drive for a short time, but get it checked to drive.