P2004: Intake Manifold Runner Control Stuck Open Bank 1
A generic powertrain (engine and transmission) trouble code, same meaning on every brand.
Yes - expect weaker low-speed pull and slightly worse economy.
Symptoms
- Poor low-end torque
- Rough idle
- Reduced fuel economy
Likely causes, most common first
- Intake manifold runner flap stuck open
- Carbon buildup on the flap shaft
- Actuator or linkage broken
- Vacuum leak in the control system
Read P2004 yourself before paying for diagnosis
A basic Bluetooth OBD-II scanner ($20-40) plugs into the port under the dashboard and shows this code with live sensor data on your phone - useful both for confirming the fix and for talking to a shop from an informed position.
What is going on and how it gets diagnosed
P2004 says the intake manifold runner flaps on bank 1 are stuck open. Many engines use movable flaps to lengthen or shorten the intake path - long and narrow for torque at low speed, short and open for power at high speed - and a flap stuck open removes the low-speed benefit.
Carbon is almost always why. Crankcase vapour and, on direct injection engines, the absence of fuel washing over the ports let deposits build on the flap shafts until they seize. Cleaning works when caught early; on some designs the flaps and their linkage are part of the manifold and are not sold separately.
Repair options and cost
Typical US independent-shop ranges, parts and labor. Dealers run higher; regional labor rates vary.
Owner reports mentioning P2004
“Exited side street onto main 4 lane main road with a median. Upon pulling out wrench light appeared causing all power to engine to cease, oncoming traffic almost hit me. Upon limping into median I shut vehicle off and turned back on. Wrench light was gone, check engine light was there. Code P2112, P2004, P2009.”2014 Ford F-150 · Jul 2026
“The warnings shown in the attached picture came on for no reason all at once then after a restart of the engine, they all disappeared except the check engine light. OBDII code reader shows the code P2004, but after clearing the code with the OBDII tool, the check engine light doesn't come back, which should mean the problem P2004 does not exist anymore. The same story has happened several times in the past year.”2016 Nissan Rogue · Sep 2023
“Driving uphill when the car suddenly jolted, lost power, and all warning lights became illuminated. All safety features were disabled as well. The sudden stop almost resulted in being rear ended and the car was barely drivable afterwards. Diagnostic trouble codes: P26A6, P2004, P2005, P060B, P0191, P24B9, P2200, P2400.”2019 Subaru Forester · Feb 2023
Show 4 more owner reports
“I have a 2026 nissan rogue and was driving on the interstate. Thought I got bad gas because I could push the accelerator and not go any faster. My check engine light came on and I had it tested. It is showing p2004 intake manifold runner control stuck open bank 1. I know some nissan's have a recall on this but not my VIN number. Was wondering if this is a issue with other people and if would be a recall at some point.”2016 Nissan Rogue · Aug 2020 · 87,000 mi
“P2004 dodge p2004 dodge - intake manifold runner control stuck open read more: http://engine-codes.com/p2004_dodge.html#ixzz3fraoseks”2007 Dodge Caliber · Jul 2015 · 160,000 mi
“The check engine light came on. Cause ,after running code check,p2004. Runner control vale stuck. Replace solenoid. Front struts gone. *tr”2007 Mazda MAZDA3 · Mar 2014 · 95,000 mi
“Every time it rains and I drive the vehicle at stop light or a any complete stop. Engine starts stalling. Then cuts off. This issue has gone for about 4 months only when it rains. Check engine comes on with code p2004( manifold runner bank 1 stuck open.) I have replaced the whole manifold with new parts I bought from dodge dealer. Check engine light doesn't go away after trying to delete code. I was told that I had to go to dodge dealer to get it reprogram which will cost me. Should have to pay to get reprogram if I exchange parts on the car. *tr”2008 Dodge Avenger · Oct 2013 · 80,104 mi
Cars that report P2004 most often
Based on mentions of this code in NHTSA owner complaints.
Frequently asked questions
Can I drive with P2004?
Yes - expect weaker low-speed pull and slightly worse economy.
How much does it cost to fix P2004?
Typical US repair costs range from $200 for the simplest fix (intake runner cleaning) to $1,400 in the worst case. The right number depends on which cause your car has - see the causes list.
Related codes
The codes closest to P2004. They often appear together, and telling them apart is usually what narrows the diagnosis.
Definition per SAE J2012 standard nomenclature. Symptoms, causes and costs are editorial guidance - always confirm with a diagnosis of your specific vehicle.