Throwing code P0137

[tmc2k1]

Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)

This is the O2 sensor for the catalytic converter correct? I currently have 59k miles on the car and I got a Magnaflow high flow cat around 40k miles. It seems kind of weird if it is my high flow cat that is messing up. I haven't changed any of the O2 sensors yet. I don't want to change the O2 sensor for the catalytic converter if the code wont go away. I know that this O2 sensor is to just tell if the cat is functioning properly and serves no purpose otherwise. I just want the SES light gone. Is it my catalytic converter causing the problem or do I need to replace the O2 sensor? Which is it? How can I figure it out>

Thanks!!

[michael454rs@hotmail.com]

Re: Throwing code P0137

from what ive read the high flow cat triggers the ses light. youre going to have to use and o2 sim to get rid of it

[tmc2k1]

Re: Throwing code P0137

Also, the SES light will go on for maybe 100 miles and then go off.....go back on...off etc. It never stays on 100% of the time. Is it definitely the high flow cat causing the issue?