Powertrain, generic (extended)

P2004 Intake Manifold Runner Control Stuck Open (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Flap shaft sticking, worn or separated inside the manifold
Runner control valve contaminated or corroded
Vacuum hose or actuator diaphragm leaking

Symptoms

  • Malfunction indicator lamp on
  • Weaker low-speed torque

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–700
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

intake manifold runnerimrc actuatorimrc control valveintake manifold

Related codes

P2005P2006P2008P2014P2015

References: fordservicecontent.com, newtonnet.co.uk, static.nhtsa.gov, static.nhtsa.gov.