You could try if you want but I doubt that will fix the problem. God knows what kind of cat you purchased, a Carsound converter would probably worked out better. I wouldn't personally run the car without the secondary O2 sensor. One option that would be available for you to rid the check engine light would be to run a O2 simulator.


Something like this. Click here

It would be wise to first diagnose the problem though. The o2 sensor could be the problem here instead of the cat. Code 63 & 65 are Secondary O-2 Sensor problems.

You could have someone with a OBD2 scantool read the check engine light. Autozone does it for free where I'm from. Or you could jump the Ecu yourself with a paper clip. Here's an example for the 94-00 Integra.

Locate the green factory diagnostic plug next to the ECU. Find this plug in the passenger side foot well underneath the far right hand side of the glove box. It's the two-pin connector that contains a brown and black wire.

Jump the "blue" two pin connector by inserting the end of a paper clip into each hole. Then turn your key to the on position. Don't turn the car on or you could possibly blow a fuse. Here's the hard part, you will then have to read the number of flashes from the dash (check engine light).
There will be a set of long flashes and rapid flashes.
Long extended flashes =10
Rapid flashes = 1

Example: six long flashes would be 60, seven rapid flashed would be 7. This indicates code 67.

This was for your information, hopefully you found it useful.

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