Hi, I am new the the group. I have a 2016 Sonata Hybrid with 100,177 miles and have the error codes of P0AA6 and P1B77.
Of course there was a check engine light with Hybrid System warning. It reset itself and all was fine after I shut it down for 30 min, but came back again after a few minutes.
The car was charging and using the Hybrid battery for the few minutes/miles. After that I only had gas engine to power vehicle.
Has any one had this issue.