Thanks for that info - the plug I am using has no issues (verified by electrician). The dealer did check the car and said there was nothing wrong other than to flash the HBCM or whatever which did remove the codes, but obviously not the problem.It may not being related at all because I had no such "Service High Voltage System" or "Propulsion power reduced" messages but just in case:
Last year my 2013 had intermittent charging issue with different L2 charging stations. The EVSE had a ground fault issue (refused / stopped charging) when temperature was damp wet due to the cracked J1772 connector on the Volt side, as reported to me by my dealer. Once connector replaced, the problem never came back.
If you have power quality fault codes at home, make sure your electric installation verified by your electrician...
Coolant level is *not* above the black label, it's in fact just below it. Does that mean I need to add some? I did order the level sensor defeat plug not too long ago.
The "Unable to charge" message just happened again this morning, removing 12v and resetting computer fixed the issue *again* and car is charging fine now on L2 (just drove 70km and got home with 3km left!). No idea what is going on. Wish the dealers around here would spend more time looking at the car but they just go to their code screen and fix that way.