i have an integra ls 96 model, with a greddy cat back exhuast and just gutted the cat. my cat converter has a o2 sensor in it. now the check engine light comes on about every 4 to 5 days. checked the code and it was "67" catalist something.
any ideas on how to fix this.

 

Replace 02 sensor.

 

Means bad catalyic converter.