my car seems to bounce back and forth when idle/ stopped at a light. on 2009 Chevrolet Cobalt

the engine light does not always come on when this happens

by in Woodbridge, VA on January 29, 2014
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2 answers
ANSWER by , January 29, 2014
Have a scan test performed for the stored codes and componets check.
ANSWER by , January 30, 2014
codes should be stored in ecm,have them scanned and post so we can adv