2000 Integra R

I got a code 63 after header, highflow cat, and exhaust install.(2.5 all the way) is this O2 sensor even related to the header and cat sensor or is this code talking about a completly different sensor.

code 63 Oxygen Sensor, Heated - Sensor 2 (Secondary) high voltage, low voltage, or slow response

I need some remedy/cure. Thanks

 

A code 63 refers to the oxygen sensor immediately downstream of the catalytic converter, threaded into the cat itself.

One of two things are happening.
a) The ECU isn't receiving any voltage signal from the sensor (either due to a broken lead or insufficient ground).

b) The voltage coming back from the sensor is deemed by the ECU to be outside of normal parameters.

If you still have the original CD stereo in the car, find the anti-theft code.
Once you've got it, disconnect the positive battery lead for 10 minutes to clear the code from the ECU.

If there is any doubt in your mind about the connection between the sensor and the wiring harness, check it to make sure the sensor is plugged in before re-connecting the battery lead.

Once that's done, go for a drive long enough to get the catalytic converter good and hot. The code shouldn't return.

 

with only 1 or 2 exeptions Hi-flow cat = No Cat. Without any type of catalyst the CEL will be tripped after a very short distance, and you will not be able to pass any type of emissons. Honda cats are very free flowing and getting a high flow cat doesn't really anyhting. (don't take my word for it, see if you can find one dyno graph to show a gain from the cat alone.) I would just chalk it up to a lesson many of us here have learned and throw the stock cat back on.