catilac converter
#1
catilac converter
hi there I got a code p0420 I changed the upstream oxy sensor. 250 miles later the same code came back..
befor I take it to a shop is there anything I can to to clean out the cat converter, do they sell anything at autozone or advance auto parts...
also when I take it to a shop can they test a cat converter befor I think I need a new one
befor I take it to a shop is there anything I can to to clean out the cat converter, do they sell anything at autozone or advance auto parts...
also when I take it to a shop can they test a cat converter befor I think I need a new one
#3