[brumbowski]

So I've got a 2003 3.3L 4x4 and I am getting the P0430 code on it. So it obviously has to be a bad cat or a bad o2 sensor right? Now I also am feeling a vibration or rattle when initially accelerating at about 2k rpm. Does this imply that it definitely is the cat that is shot?

 

[dejablue]

I would think so also and is not the o2 sensor.