failed em test says NOT READY then drove it n check engine came on smell burning on 1999 Chrysler Concorde

smell burning lik overheating every so often but not consistent and check engine light popped up as soon as i put 80 miles on it after failing a emission test due to system not ready beacuse i changed the battery

by in Duluth, GA on October 03, 2012
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1 answer
ANSWER by , October 04, 2012
scan codes and post so we can adv it may be a thermostat issue