need O2 help immediately

[bob123131]

So bringing the car to get tuned in 2 hours. Just checked my check engine lights because i have one for my mdf since aftermarket intake mani. Now i have o2 senor. It says PO135 o2 heat sensor circuit one is this the one in my O2 housing or after cat? Is there even a point of bringing my car if this doesnt work.

 

[wret]

It's only the heater circuit and won't affect your mixture after the engine is warmed up. Should be all right to tune. And yes, it would be in your O2 housing.