On the 2005 Dodge Magnum with the 2.7L engine, the P2098 is pointing to a problem with the downstream oxygen sensor for bank-2. This sensor is located on the exhaust pipe behind the converter on the left side of the engine. Inspect the electrical connector and wire harness for any loose, broken or damaged wires. Make sure there are no exhaust leaks before or after the sensor mount location. Make sure there are no current cylinder misfires. If all of these check ok, replace the sensor. To replace, unplug the electrical connector and unscrew the sensor from the exhaust pipe.
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