I have a 2006 HHR this isn't my first I bought this used, It keeps having the check engine light come on and not go off? The dealer has checked it and says it is a misfire, we changed the oil and had it serviced last week. The engine light is back on and flashing some of the time. What is wrong does anyone know?

 

Welcome.

Without you providing the 'code' that is downloaded from the check engine light issue, any suggestions we could make would be a total guess. You really do need to get that code posted and the members here can then offer some good suggestions.