What does code P2004 mean?

what does cause P2004 CODE an were is it.
My car has a manual transmission.
Experienced mechanics share their insights in answering this question :
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.

How to Identify and Fix Common car Problems ?

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Essentially, this is the part that controls how fuel gets pumped into the part of the engine that combusts fuel to produce power. This system is controlled by the powertrain control module, which means if the actuator is stuck open, it might be a problem with either the intake manifold or the powertrain control module.
Common signs include difficulty starting the engine, the Check Engine Light coming on, engine misfires, and a decrease in power and acceleration.
That means you`ll have a rich exhaust and diminished fuel efficiency. This code can also cause hesitation when accelerating, as well as a rough idle and engine surge issues.
Can I Still Drive with a P2004 Code? Since the P2004 code can negatively affect engine performance, driving with the code triggered for more extended periods is not recommended.
The mass air flow (MAF) sensor is one of the key components of the electronic fuel injection system in your car. It is installed between the air filter and the intake manifold and it measures the amount of air entering the engine, the air flow.
Above and behind the serpentine belt, you`ll find a black box with linkages coming out of it. The box contains an electric motor that controls two doors or flaps in the side of the intake manifold [Ford calls it the Intake Manifold Runner Control].
Generally a really bad intake manifold gasket will make a car run rough at idle and/or cause a service engine light to illuminate. … As far as driving the car, as long as you don`t have a fluid leak or the car is not stalling or running rough, it should be fine to drive for a few months.
It`s not a good idea to drive your car if it has a bad intake manifold, for these reasons: If you`re losing coolant, your car could overheat. If your car is stalling or not performing properly, you could get into an accident. A minor intake manifold problem could turn into a major one, if you neglect it.
Where is the Manifold Absolute Pressure Sensor Located? The MAP sensor is typically located on the intake manifold, either next to or on the throttle body itself. (On a forced-induction engine, the MAP sensor can be found on the intake tract before the turbo.
Common problems with intake manifolds include vacuum, coolant or oil leaks, reduced flow due to carbon build-up and issues with the intake tuning valves. In some engines, an intake manifold can corrode or crack causing either vacuum or coolant leaks. A cracked manifold must be replaced if it cannot be safely repaired.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I have a Code P0601 on the PCM. I replaced the PCM, and now I have a code P0118, code P0123, and code P0193.
ANSWER : Hi there, the short answer to your question is no . A PCM with a P0601 (which is a memory module error in the PCM) cannot reliably retrieve codes for the codes you list (P0118 – coolant temp sensor, P0123 – throttle position sensor, P0193 – fuel rail pressure sensor.

Most likely, the P0601 prevents the PCM from getting any codes from the engine sensors. The memory module error may cause in data corruption for collected sensor values, lose of data over multiple sampling periods, or failure of the data collection to work at all. Replacing the PCM was a necessary expense.

If you need assistance with the "new" codes, I would recommend having a Check Engine Light inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose the new error codes and get an accurate assessment of the repairs needed.

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It threw a code 21 , throttle position sensor bad code. i replaced it and the code went away but i still have no spark.
ANSWER : Hello and thank you for contacting YourMechanic. The problems that you are encountering with your vehicle, could be caused by the harness to the Throttle Position Sensor (TPS) or the computer itself.

Check the harness to the TPS for any debris or any corrosion. Hook up a paperclip to the harness and turn on the key. Use a multimeter and check for voltage at the pins of the harness. Make sure that the ground on the sensor is grounded and has no resistance. If you find that the harness is having too much resistance, then I recommend having the main engine harness replaced. If you have replaced the harness and still have the same problems, then the computer will need to be flashed or replaced.

I recommend having a professional, like one from YourMechanic, come to your home to diagnose your car’s no start condition before replacing any parts.

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Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..
ANSWER : Once a trouble code is erased, it cannot be retrieved. The engine controller does not have a "recycle bin" like they have on Windows. If the car still has a problem, the code will come back up after some driving. However, the controller will not turn on the CEL until it has seen the malfunction on two separate "trips." A "trip" is a driving cycle where the car is started cold, driven until it is fully warm and through a certain number of accelerations, and shut down. So you might not see the CEL for a couple of days. As for the "head gasket sealer," I wouldn’t hold out too much hope of that solving a problem. At the very best it might put off the symptoms for a short while. If you need help interpreting codes that come up, or solving a head gasket issue, contact Your Mechanic. They can send a technician to your home or office to read the codes on your car and help you decide what to do.

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What does code P0008 mean when the engine light is on
ANSWER : Yes, a P0008 code is related to your engine’s timing. More than likely, you need to have the timing chain and/or tensioners replaced. If you would like to have this done or would like to have a second check, a certified professional from YourMechanic can come to your car’s location to diagnose the code more thoroughly, and can verify and perform the appropriate repair.

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Chrysler 300 2005 abs not working. Code c2116. Does this mean my abs pump is dead for sure? Or could it be abs sensors.
ANSWER : Hi there. Take a digital volt meter and check the voltage on the harness to the ABS control motor. There should be a battery voltage present. If the voltage is low, then there is a break in the wiring from the computer to the ABS control motor. If the voltage is normal, then the ABS control motor has a burned cell and the ABS controller assembly would need replaced. This will effect the ESP system as well and set off the lights. If you need further assistance with your ABS system not working, then seek out a professional, such as one from Your Mechanic, to help you.

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Service engine warning, MAF code and O2 sensor code, along with check suspension light are turned on
ANSWER : Hello, it sounds like you have quite a few things going on. I am going to do my best to break them down for you.

First if the engine is very loud when idling and the belt has already been replaced, there may be an issue with the tensioner or idler pulley.
Next, the Navigator is known for needing service to the air suspension system as it gets up in miles, the most common causes of these are the air struts themselves have failed, or one of the air lines has a leak.
Lastly, if the O2 sensor and MAF are continually coming back after the sensors have been replaced, the most common cause would be either an exhaust leak or a vacuum leak.

Qualified technicians such as the ones at YourMechanic will be able to diagnose these issues and recommend the best path to repair, starting with a diagnosis of your warning lights.

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EGR code, Cylinder 4 misfire code 0304 detected.
ANSWER : Hi there. The Exhaust Gas Recirculation (EGR) valve may be not designed for the emissions requirements for U.S. standards. If the EGR is pulling from cylinder number 4 and after replacing the EGR and the computer detects a misfire, then the EGR is malfunctioning and not responding. When you close off the tube to the EGR and the EGR light comes on and the misfire light goes out, then the EGR is not responding to your emissions system. I recommend replacing the EGR with the OEM specified part for the engine and all of the issues should go away. If you need further assistance with your misfire and EGR, then seek out a professional, such as one from Your Mechanic, to help you.

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Check Engine Light codes. 2006 Mercedes Benz E55 AMG
ANSWER : Since you are getting many different codes from different areas of the engine, you may need to have the system hooked up to a factory scanner since most of these generic codes do not cross over in my repair software. I would also check with the local dealer to see if any service campaigns are open on the vehicle since there are over 30 possible campaigns that could pertain to this vehicle and some of the problems you are having with the secondary air system. This may be the cause of some of the codes and supercharger disabling. If you’d like to have this checked elsewhere, a qualified pro from YourMechanic can come to your car’s location to go through each Check Engine Light code firsthand and have them resolved.

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