Skip the auto shop - Our mechanics make house calls

Q: What does code P2004 mean?

asked by on

what does cause P2004 CODE an were is it. My car has a manual transmission.

Diagnostic trouble code P2004 signifies a problem with a segment of the engine’s air intake and control system, technically known as the intake manifold runner control (IMRC). In practical terms, the code means that the engine is not getting the right amount of air to perform efficiently. There are quite a few sensors, as well as mechanical components, that can account for this fault.

Here is a list of some of the possible root causes for code P2004: a defective IMRC solenoid; IMRC solenoid wiring that has shorts, has breaks, or is frayed; IMRC solenoid circuitry that has shorted or is open; an IMRC solenoid connector that is corroded; IMRC butterfly valve plate screws that are loose or broken; broken IMRC butterfly valve plates; IMRC butterfly valves plates that have disconnected from the IMRC actuator; a clogged vacuum control solenoid vacuum filter; debris in the vacuum control solenoid; vacuum lines that are disconnected or broken; or carbon buildup on the IMRC butterfly valve plates. If none of the aforementioned defects account for the fault, there are three other systems that should then be evaluated as well. Check for trouble codes that have been stored by the powertrain control module (PCM) in relation to the exhaust gas recirculation (EGR) valve, the mass airflow (MAF) sensor, and the barometric pressure (BARO) sensor.

If the fault is due to the mechanical butterfly valve in the intake coming loose, that could result in big problems as this is a metal part that could potentially get sucked into the engine causing further damage. Consequently, this is not an issue that can be put off in terms of getting the problem diagnosed and repaired. Also, while the fault exists, you are likely getting lower gas mileage, which of course is costly.

A certified technician, such as one from YourMechanic, can evaluate the fault during a Check Engine Light inspection and let you know which component(s) has failed and then get the vehicle repaired for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do you activate the horn beep feature on a Ford when using the remote?

Hello. Your particular vehicle should honk the horn only after the second press of the key fob button. On the first press of the button it will just flash the lights. I did find a little information on the topic...

Q: Will this service remove my check engine light and allow me to pass emissions?

The answer is "not necessarily" because the Codes you are reciting, P2004 and P2017 do NOT necessarily mean that there is anything wrong with the intake manifold runner control valve itself. The only way to determine if that valve is...

Q: Average price to replace a 2005 scion xb 1.5L motor in CA.

Billing question sent to CS for the cost to replace an engine in a 2005 Scion xB. The engine size is L4-1.5L.

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...