Hey guys! I'll go ahead and say thanks in advance, but this is my first post on honda-tech. I have a 2000 honda civic hx. I just replaced the whole exhaust system to an EX setup with Megan Racing header, OBX high flow cat, and Tsudo catback 2 days ago. Yesterday morning, my CEL lit up. It shows a P0420 code and P1163 code. Correct me if I'm wrong, but aren't those codes for the primary AND secondary o2 sensors? Would this mean I have an exhaust leak in between the 2 sensors? Help?!?!?