Aight check it, i was asking about this post before but no one responded. Situation is I have a dohc vtec motor with all the bolt ons and a free flow cat. Every 30-45 mi. driving distance, my check engine light comes on, when we ran the scan on it, it says that secondary o2 sensor is (obd 2 car by the way) is conflicting) i reset the ecu so i could keep track of the problem. I heard that with having a free flow cat that this problem will normally occur but in a way this can hurt performance due to richer running conditions. Now i dont know too much about this dilema but i heard there is a way to bypass the o2 sensor. 1 is to get a obd 1 ecu, or 2 is to get some kind of bypass put in. Please help me out guys. Thanks alot

Chris

 

http://jdmfan.com/technical/performance/o2sensor_simulator/

Try this

 

Thanks alot guys, i knew someone could help me out. Ill get right on it this week and keep you guys posted.


Chris

 

Sensor is fine or it would trip right away.
Your cat is not functioning the way the ECU believes it should and therefore trips the code. Solution is bypass sensor or replace cat.