2014 CTS AWD has started shutting down while driving. Experienced it twice in the last three weeks (0815). Has anyone experienced this problem? The dealer reports that they are seeing communication codes....whatever that means.

 

Can be some issue with spark plug i guess you need to have it services which is something that can be completely helping and going into your favor.

 

The dealer had to replace the Engine Control Module (ECM) this seems to have rectified the problem.