wnmech

My 01 LS-1 formula keeps throwing a p0430 code I replaced both right side O2 sensors and back in December I replaced the right cat for another code. The engie has around 70K miles on it and runs great. What else would throw the code? The car is bone stock. Is there any way to bypass those right side sensors to eliminate that code from returning? Thanks for any help.

2001NBMZ28

You replaced the cat or did the dealership do it? Stock cats are covered under warranty for 10 years/120K on the 00-02 cars.

wnmech

The cats were replaced a couple of years ago under the recall. I replaced the right cat back in December after it was giving me a code but I dont remember what it was so I replaced it with an aftermarket cat and I have had no engine service light on for several months now it will come on after being interstate driven for about an hour

2001NBMZ28

Aftermarket cat is probably the problem, in your original post you said the car was "bone stock." If you just want the code off on that side you'll need to get it turned off or put an 02 sim on it.

wnmech

Where do you get O2 sims? If I install one will it in anyway alter the car performance? Thanks for the help.