VSC trac, vsc off, ..

So my brakes failed on my 2005 v6 4runner. The caliper was bad and leaking fluid. I replaced it, flushed the brake fluid (new through all 4 calipers), and still had lots of lights and the warning buzz. I disconnected the battery and the lights went off, but the vsc trac, vsc off, squiglly tire track symbol, and check engine light came on. Owners manual says it could be low brake fluid, but i'm not getting leaks and if anything, the fluid might be a little high. Im getting p2196 and p2198 codes (o2 sensor rich fuel ). I guess this could be coincidental that im getting o2 codes, but could it be related to my brakes?

 

Weirdest thing. I cleared the codes a couple times and have driven for 2 days without issues. Don't know why they tripped or why they went away.