DoubleEWith my car, it set the code while charging at a public charging station. I assumed there was some sort of issue with the station itself which triggered the code so I went ahead and cleared them. About 2 weeks after, the codes reappeared while charging at home on my Siemens Level 2 station so I decided it was best to have the dealer take a look. Other than reduced EV range, the car seemed to drive just fine.
Man that sucks hopefully its all covered under the powertrain warranty. I'm guessing mine won't code until after I'ev exceeded the miles (I'm at 78K reaching 100k in about 18 months or so).