the engine light does not always come on when this happens
Chevrolet Q&AAsk Your Question
2009 Chevrolet Cobalt Question: my car seems to bounce back and forth when idle/ stopped at a light.
Answer #1pushrod January 30, 2014, 00:43Master
Have a scan test performed for the stored codes and componets check.
Answer #2Greg's Orange Auto (14981 Answers) , Orange, CA - (714) 361-9386globalhelper January 30, 2014, 09:33Master
codes should be stored in ecm,have them scanned and post so we can adv