My 1999 Accord Engine Light came on and I went to Autozone for a diagnostic. Got this code.. "P0420 Catalyst System Efficiency Below Threshold".. The dude told me to get the cat convertor replaced.
This is the 4th time catalytic conv failed in this car, the last time was about 2.5 years ago...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.