Did it today, took about an hour. I took some advice from this forum or another to wrap duct tape around a 5.5 mm socket (for more grip) and just twist the screw by hand. That way I only had to undo the glove box. It was tight but I was able to do it. Took me installing it twice to get the 180 degre...

I could swear this just happened to me in NC as well. Filled up at a discount "may contain 10% ethanol" station, and got the P0420. Stayed on throughout the tank. Filled up again after reading this thread at a BP, light gone within 30 minutes. Will see if this happens again and repost...