Code Help P0430

[wnmech]

My daughter just got back from a 150 mile trip and said her service engine light came on. I went to A/Zone and it pulled up code P0430 which tells me either my pass side cat is bad or maybe pass O2 sensor. I had them clear the code I hope it dont come back. Any troubleshooting help is appreciated. Anyone else familiar with this code?

[2001NBMZ28]

9.7 times out of 10 it's the cat. You can look up the code/diagnostics at gearchatter.com GM just extended the cat warranty to 10yrs/120K on the 00-02 cars. You can swap the rear 02's from side to side (then clear the code) and see if it throws P0420 for the drivers side. If it moves it's the sensor, if it stays P0430 it's the cat.