Greetings!
Dragon has been blowing a bit of white smoke on cold startup, and threw codes:
P0137 (bank 1 sensor 2)
P0157 (bank 2 sensor 2)
Guy thought is was the 02 sensors going bad as they were not giving a very high reading, .678, .569, .696, .726 for the 4 senors. He indicated they usually have a higher reading than that. Also though it could be poor quality gas, which I shamefully have been using....
He cleared the system. I told him I was gonna check around here and see what you guys might have to say.

I am scheduled to drive to Irvine tomorrow (600 mile round trip) and was hoping I am not gonna slay the Dragon.

Thanks in advance for your help.
Best,