There is a reflash for your computer for this code. There is a TSB for the code p2004 Here it is.
Flash: MIL Illumination with DTC P2004
This bulletin involves selectively erasing and reprogramming the GPEC Powertrain Control
Module (PCM) with new software and replacing the intake manifold as required.
CAUTION: VEHICLES EQUIPPED WITH A CVT TRANSMISSION MUST HAVE THE
TRANSMISSION CONTROL MODULE (TCM) CHECKED FOR THE LATEST
SOFTWARE LEVEL WHENEVER THE PCM SOFTWARE IS UPGRADED. IF
NEWER TCM SOFTWARE IS AVAILABLE, IT MUST BE INSTALLED.
2007- 2008 (JS) Avenger
2007 (JS) Sebring
2008 (JS27) Sebring Convertible
2007 (MK49) Compass
2007 (MK74) Patriot
2007 (PM) Caliber
NOTE: This bulletin applies to models equipped with a 1.8L, 2.0L or 2.4L gasoline
engine (Sales Code EBA, ECN or ED3) as follows: Flash portion applies to
PM/MK models built through April 21, 2007 (MDH 0421XX) and JS models
built through May 15, 2007 (0515XX). The Intake Manifold Replacement
portion applies to models built through March 22, 2007 (MDH0322XX).
Some customers may experience MIL Illumination with no other symptoms. The condition
may occur intermittently. Further investigation by the technician may find DTC P2004 -
Intake Manifold Runner Control Stuck Open as the cause for MIL Illumination.