the engine light does not always come on when this happens
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2009 Chevrolet Cobalt Question: my car seems to bounce back and forth when idle/ stopped at a light.
Answer #1pushrod January 29, 2014, 21:43Master
Have a scan test performed for the stored codes and componets check.
Answer #2Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386globalhelper January 30, 2014, 06:33Master
codes should be stored in ecm,have them scanned and post so we can adv