trailrated

I'm aware. I've spent hours and hours researching this. It can be more than just the O2 sensor, though. Thus, I'm seeing if I can weed out the other possibilities (ex. aftermarket header issues).

Hello All, I'm looking at a '06 MCS to buy. It has the Alta Header/Cat on it and is throwing the P0130 code. I'd like to get an OEM exhaust manifold to replace it and get the O2 sensors replaced as well. I'm hoping that would remedy the situation. Does anyone have an OEM exhaust manifold & cat they'd be willing to sell? I'm in N. Virginia. Thanks! Will