Check engine light went off on it's own before I could get down to look at it...should I still replace the sensor or try the cleaner stuff and see where that goes?
Also, in this pic, this is the passenger side...is the red the downstream and blue the upstream?
But right now since the light went out on it's own I'm leaning towards doing the fuel system cleaner and seeing if it comes back. Especially since I'd have to order the sensor from Atlantic British anyway. Couldn't hurt to try the fuel system cleaner. Would it be that bad to do it and wait a few thousand miles for an oil change? Just did one...have about 4k left.