ok, so i just got a rex that was pre-swapped. its not running right, so i checked the ecu for codes. its throwing codes 1 and 2, primary and secondary o2 sensor codes. The car has a dc header on it, and only has provisions for one 02. I am going to be chipping the rex, and want to disable the 2nd o2 in the rom, but dont know how.... but for now i want to fix this problem. Also do the obd0 b16's use 1 or 4 wire o2's? Im just looking for some quick help on this, b/c its getting irritating. lol. anyone have any o2 specific links they can hook me up with? w00t, thanks.