2005 Subaru Forester Q&A

2005 Subaru Forester Question: ]code for catylatic converter check engine light will not go off

do i need to replace the catylatic converter before i register the car I just bought it from a private party used and the light went on the next day after i got it. The other flashing light is the cruise control witch will not engage when you try to set cruise control -
Answer 1
What is the code for the convertor? -
Comment 1
P0420 I bet! Makes no difference, how many replies do we get anyway? -
Comment 2
green jelly will fix it. Advance auto has it ....$6.99 per 8oz. jug -
Comment 3
Shine is cheaper than that! It will fix anything, for awhile! -