P2004Intake Manifold Runner Control Stuck Open (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Intake manifold runner control (IMRC) uses flaps in the intake manifold; petrol engines switch runner length or tumble, diesels close swirl flaps at low load. P2004 means the flaps on bank 1 stay open when the ECM has commanded them closed, judged from the position feedback. Ford checks commanded against actual plate position after coolant exceeds 40 °F (about 4 °C) and needs four events to set the stuck code; its 2012 summary covers both vacuum and electric actuators. Volkswagen's 2024 bulletin for Golf GTI, Golf R and Arteon lists P2004 as stuck open alongside P2006, P2014 and P2015, caused by contamination in the runner control valve N316. Volkswagen's 2017 bulletin for the 2.0T (BPY, CCTA, CBFA), by contrast, labels P2004 as flap stuck closed, so the manufacturer text in the scan tool may differ from the generic title. Typical causes are a sticking or broken flap shaft, a vacuum leak or a failed control valve.
- What you may notice
- Malfunction indicator lamp on
- Weaker low-speed torque
- Likely causes
- LikelyFlap shaft sticking, worn or separated inside the manifold
- PossibleRunner control valve contaminated or corroded
- PossibleVacuum hose or actuator diaphragm leaking
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.