I know i put a greddy kit on and i showed o2 CELs for both sensors!i am in the process of ordering more with a high flow cat!From what i have been told running rich(cuz Emanage wasnt connected correctly) it caused my sensors to go bad! If your wires get melted you will probably need a new sensor/s!I just hope it is the o2 sensors and not me ecu!!any body know this too???