P0430 GMC -

Question

replaced both o2 sensors originally had a different code then i replaced sensors now i have the p0430 code should i just go ahead and replace the converter or should i just remove cat and put in a peice of test pipe ?

Answer 1

If you put test pipe in then the code will remain. Replacing the converter is the best option to get rid of the converter code.If the original codes were for the O2 sensors, they are now reading right and that is why you have the converter code.