Mike, I got a new oxygen sensor from Amazon of all places; they had the best price for the Bosch sensors out of the places I checked. I got the part number from off your site.
Since clearing the codes I have driven maybe 200 miles, and the only ones that came back were P1117 (came back immediately) and P0430 (came back withing about 25 miles)
I guess one is for bank 1 and one is for bank 2 so I guess they are not related. Darn it... so it sounds like that cat might be wearing out.
The value for the MAF voltage when the car was off was 1.01, and at idle it started off around 1.6 when i first cranked it up, and then settled down to 1.4 something once it got warmed up a little and the idle came down. It ultimately settled at 1.3 when my idle settled down to a smooth 625. Those are within the good ranges that I have seen on this site (between .9 and 1.1 when off and between 1.2-1.5 when idling)
I bet those other codes may have been older code; so if they don't come back then I guess I am good; if they do then I will look into throttle body cleaning and checking for leaks. The car is running good so all is good except for that darn CEL
Steve