Contour Enthusiasts Group Archives Forums General Troubleshooting P0430 maybe fixed without replacing cat?

Replaced both upstream O2 sensors today (Hands are all cut up too!), used cleaner like you said... before the swap, and also added a can of B12 to my fuel.

No check-engine lights so far after about 60 mile combined city/highway.

I will report more results after more milage.

Car has 103K miles, had original O2s, and P0430 codes..

thanks Brian!