A whine type noise may develop form the engine area when the car is idling (typically in warmer temperatures, after the engine has warmed up). It's possible that the noise may be from the engine oil system and is harmless. Still, have a technician verify that the noise is nothing to worry about.
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Most reported 2006 Dodge Magnum problems
"False" trouble codes may cause erroneous illumination of the Check Engine Light. Updating the PCM software can often correct this concern.
The sunroof would not close completely flush with the roof of the vehicle causing a loud wind noise. I found a related TSB and it recommended pulling a fuse while the sunroof is opening, replacing the fuse and proceeding to open and close the sunroof. Worked for me!