Error Code P2004: What It Means & What To Do?

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The trouble code P2004 can be explicated as Intake Manifold Runner Control Stuck Open Bank 1. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code. It indicates that the intake manifold runner control (IMRC) is stuck in the open position on Bank 1.

It is the engine control module which would examine the intake manifold runner control. This trouble code would be set by the ECM when the intake manifold runner control would not be as per the parameters set by the manufacturer.

What causes this problem with the Intake Manifold Runner Control Stuck Open Bank 1?

• Faulty IMRC actuator solenoid
• Unattached or binding intake manifold runners
• There can be distorted intake manifold runner position sensor
• The wiring in the IMRC actuator solenoid control circuit might be opened or shorted
• Quirks in the MAP Sensor
• Eroded IMRC actuator solenoid connector face

1. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness.
2. Intake Manifold Actuator - The intake manifold actuator assists the intake system in providing correct air flow in the engine cylinder for proper combustion process to take place. The actuator controls the valve and the plates assisting the proper air flow and thus must be replaced, if required. Buy new actuator from us today.
3. Intake Valve - Proper functioning of the runner valve is necessary so that the required amount of air can enter the cylinder for optimal air to fuel ratio. If the valve is damaged or not working properly, the can lead to lean or rich engine conditions. Thus, replace faulty valve now!
4. Intake Manifold - The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a direct injection engine) to each intake port in the cylinder head(s). Even distribution is important to optimize the efficiency and performance of the engine. Thus, replace it now!
5. Electronic Control Unit - The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.
6. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.
7. Diagnostic Tool - Usually any OBD code problem requires deep insight into the problem and high grade tools in order to fix it properly. Thus, buy quality diagnostic tools form us!

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2004 here:

Common Symptoms

• Illumination in the service engine soon light
• Less fuel economy
• Decline in low end engine torque
• The engine may rush/sputter
• The vehicle might run harshly

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2004:

• Carefully adjust the faults in the IMRC solenoid circuit
• The MAF sensor should be restored to working order
• You must fix the defective IMRC solenoid connector
• It is essential to restore the flawed IMRC butterfly valve plates
• Repair or replace the quirky IMRC solenoid
• Rehabilitate the defaults in the IMRC solenoid wiring
• The malfunctioning EGR valve should be repaired or replaced as per the need
• Recondition the non-functioning IMRC butterfly valve plate hardware

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

A good starting point is always a technical service bulletin search for your particular vehicle. Advanced diagnostic steps become very vehicle specific and may require the appropriate advanced equipment and knowledge to perform accurately. We include basic steps below but refer to a vehicle year/make/model/powertrain specific repair guide for specific steps for your vehicle. The diagnosis should be started by the visual inspection of system wiring as well as connector. An open circuit can be caused due to corrosion in the IMRC actuator connectors, so it is essential to pay attention to these.

A scanner should be used by a professional technician to notice the freeze frame data, to assemble details about the code. The mechanic can also check to see if there is presence of additional trouble codes. Now if there are a number of codes, then they should be addressed in the same order in which they are appearing on the scanner. After that the mechanic should reset the trouble codes, restart the vehicle, and check to see if the code remains detected. If it does not, then the code was likely triggered incorrectly, or represents an intermittent issue. Now once the code is reset, access should be gained for IMRC actuator solenoid and IMRC runner position sensor. One can always consult a vehicle information source for checking recommendations for these constituents.

A DVOM should be used to perform a resistance test on both constituents. If the actuator or the position sensor are not as per the specifications set by the manufacturer, then the faulty parts should be replaced and then retest the entire system once again. If the actuator resistance and sensor resistance are both as per the specifications set by the manufacturer, then a DVOM should be used to check the resistance and continuity on all system circuits. You can always avoid the controller damage; this can be done by disconnecting all related controllers before testing. Repair or restore the shorted or open circuits as per the requirements. Check the IMR flap binding with the actuator disconnected from the shaft.

Common Mistakes When Diagnosing The P2004 Code

Have a look at some mistakes which are made by a lot of mechanics:

• Misdiagnosing and replacing the IMRC solenoid
• Misdiagnosing and replacing the IMRC butterfly valve plates
• Mistake of overlooking faulty or disconnected vacuum lines
• Neglecting defective IMRC solenoid connector and wiring
• Replacing the IMRC butterfly valve plates when the issue was that they were not connected properly
• Neglecting to diagnose and restoring other EGR valve, MAF sensor, and BARO trouble codes before making any repairs for the P2004 trouble code.

P2006 - Intake Manifold Runner Control Stuck Closed Bank 1