If it was a code 1, it would just flash one time real fast.. Thats what mines doing..
Is it fast flashes or slow? For the tens you will have ten short flashes to one long flash..its really easy to tell the difference. Sounds pretty strange Thermal. Plowing snow is how I screwed my O2 sensor up too. I still am not sure what I need to do to fix it. If you get a new O2 sensor dont go with bosch. Ive had 2 of them and CEL is still on. The first one Threw out a 41 which is the O2 Heater, now its giving me a 1 which is the sensor side!!
Good luck. Keep me posted on how you fix it.