"False" trouble codes may cause erroneous illumination of the Check Engine Light. Updating the PCM software can often correct this concern.Google+
Car Problem Reports
Dodge Magnum Software Updates For Powertrain Control Module to Address Erroneous CEL
Dodge Magnum Problem
Exhaust & Emissions Affected: V6
Visitor, 2007 Dodge Magnum, 151,300 mi
Car doesn't accelerate pass 45 mph. Takes a long time to get up to speed. Leaks in the power steering and exhaust.