so i just recently installed a skunk2 catback exhaust on my friends prelude. I noticed that when i had the exhaust off of the car, pieces of the cat were falling out. After installation there is a CEL for both o2Sensor Heaters. I was told there is a fuse but cannot find it, and all fuses check out OK anyway. So my question is would a gutted cat, or partially gutted cat cause there CELs?? If it is clogged would this caust the DTCs? I cant figure out why or how, im just wondering if anyone has had this problem before i go replacing the 02's. Thanks for any input guys.