Not so fast...

I've been driving this car for two weeks, the wife drives it last week and comes home and says the CEL is on. I reset it and drove it for a week never illuminating the CEL. She drives it last sat and it reappears. WTH???

Yesterday I find the loose "Bank 2 sensor 1", tighten it and reset the light. I put about 25 miles on the car afterwards. It ran fine as always and no CEL. I'm thinking it's fixed.

The wife uses it to take our 5 year old daughter to dance class around 5 pm. Calls me and tells me the CEL is on again. CRAP!

At least I am confident I can get the O2 sensor out.