Took the car out to Syracuse over the weekend for SU's last home game. No problem with the springs, the front is now a bit more firm so my handling has actual improved. That's a good thing.
I go about 60 miles (Keane, NH) and the CEL comes on. So, I see an autozone and pull in. P0420 and P0430 (Bank 1 and 2 Catalyst below efficiency); time to go back to the dealer and have the cats replaced while still under warranty.
I received the P0420 19,000 miles ago and it has just come back now. No P0430 back then, but it seems both cats are on their way out.