The P2004 trouble code relates to the intake manifold runner control (IMRC) being stuck open in bank 1.
P2004 Intake Manifold Runner Control Stuck Open Bank 1
Code symptoms P2004.
1. Rough idling.
2. Decreased engine performance.
3. Poor fuel efficiency.
4. The Check Engine Light (CEL) may be illuminated.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2004.
1. Faulty intake manifold runner control valve.
2. Carbon buildup in the intake manifold runner control system.
3. Wiring or connector issues in the intake manifold runner control circuit.
4. Vacuum leaks in the intake manifold runner system.
Code Solutions P2004.
1. Test and replace the intake manifold runner control valve if it is faulty.
2. Clean the intake manifold runner control system to remove any carbon buildup.
3. Inspect the wiring and connectors in the intake manifold runner control circuit for any damage or corrosion. Repair or replace any damaged wiring or connectors.
4. Check for vacuum leaks in the intake manifold runner system and repair as necessary.