P2004 code meaning
Intake Manifold Runner Control Stuck Open (Bank 1)
Powertrain system Generic code P20xx codes Check engine light
What P2004 means
Intake manifold runner control (IMRC) uses flaps in the intake manifold; gasoline 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.
P2004 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2004
- Malfunction indicator lamp on
- Weaker low-speed torque
Common causes of P2004
- Most likelyFlap shaft sticking, worn or separated inside the manifold
- PossibleRunner control valve contaminated or corroded
- PossibleVacuum hose or actuator diaphragm leaking
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Intake manifold runnerImrc actuatorImrc control valveIntake manifold
What each part of P2004 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 04 | The exact fault in that area. |
What to do next
- Note P2004 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2004
What does P2004 mean?
P2004 means "Intake Manifold Runner Control Stuck Open (Bank 1)". Intake manifold runner control (IMRC) uses flaps in the intake manifold; gasoline engines switch runner length or tumble, diesels close swirl flaps at low load. It is a generic code, so it means the same on every make.
Is it safe to drive with P2004?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2004 fail an emissions test?
Yes, it can. P2004 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2004 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2004 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.