So my wife came home yesterday and told me the check engine light was on. I went out and saw that it was on, cycled the car off and back on, it was still there. So I grabbed my scan-tool (I have a pretty fancy one) and plugged it in. There were two engine modules I could look at, but neither one of them had any DTC's. I also checked for pending DTC's and there were none of those either. So I unplugged and scratched my head, cycled the power one more time and the light went off. We drove several places yesterday and it never came back on. So now I'm really confused as to what it could have been.
I've seen numerous posts on here about issues with public charging stations, etc. But our Volt has never been charged on anything except its own 120V EVSE and our 240V Aerovironment EVSE. We've never had a problem with either one.