Well i'm only a dodge tech of 7 years but "problem solved " is a flippin joke. He's an idiot. He probably is a 20 year lube tech. 😁
Something caused the light to come on period. Whether it was an electric short, bad gas, whatever it was. (bad gas highly unlikely) Unfortuanately the only way to get freeze frame data this is a photo taken at the time of the code set is to pull your code on a star scan. I'm sure the autoboner guy had some of the same info but most of those guys arent trained highly in anything but how to sell you a sensor. He probably told you nothing about any freeze frame data that was there if he even knew about it.
anyway. Whether a fluke or not, i doubt. Whether it was a one time thing sure it could have been. However, without being rude, you cant ask anyone now what it was that caused it cause any source of info has been taken away. Sorry