What does a obd code 2004 means on a 2009 chrysler sebring

Kimberly, Change the spark plug, if you have not done so. Check the links below for a long list of what could cause misfire.
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http://www.obd-codes.com/p0302
P0302 OBD II Trouble Code
Diagnose Engine Misfire

P2004
Intake manifold runner control stuck open bank1
U0416
Invalid data received from vehicle dynamics control module
Hope this helps

Google it

About $250

PCM data configuration error you can pick up an OBD reader from most pats stors for about 50 dollars and reset it but if it continues to come back on you may have to replace the computer (PCM)

That the engine computer has recieved information from a sensor/s that is not correct, could be a bad sensor or other issues with the engine. I would take the car to Auto Zone and they will use an OBD II scan tool to retrieve the code/s, which will tell you where to check for the problem.

Buy a factory sensor from the dealer . Chrysler vehicles don't like aftermarket parts .

check out this web sight http://www.aa1car.com/

P2004 indicates a problem with the charge motion control valve (CMCV), actuator motor and /or linkage. Disconnect the battery so it will reset the computer. If the code returnes I think your best bet is a certified mechanic because the intake manifold has to be removed to replace it.