Check Engine Light code P2A00

CMadison

To anyone who can give me some advice:
I've installed Stillen Gen3 Intake, Berk HFC and Berk CBE on my 2012 z. The car is running great and the CEL did not come on until just this weekend, which is about 400 miles after the cats and exhaust install (intake was installed about 5K ago). I am not a mechanic, but thought I knew enough to do these myself, which I did with some DIY help. Should I worry about P2A00 (O2 sensor code)? If this is a big problem, what steps would you take to fix if it were you? If it's not a problem, should I just disconnect/reconnect the battery and forget it?

BTW: After a closer inspection I did find a few hose clamps that were a bit loose on one of the intakes. I already tightened them down, just not sure if this could have caused the O2 code.

Thanks in advance for any help guys!