I'm throwing a code 67, its a 98 civic with a D16y7 i have an aftermarket header with the first o2 sensor in the header itself and the second one in the downpipe. I have a 2.25in cat after the downpipe. Do you guys think that it is a bad secondary o2 sensor or a bad catalytic converter? Or the fact that the second o2 sensor thinks that there is no catalytic converter. I dropped the o2 sensor when i was doing the header install, could that be it. Whatever it is will i be able to pass my emissions test which i have to take in the next week or so. Anything would be helpful. Thanks