I have a 2002 With a P0420 cat code. The factory cat was replaced a couple of years ago after becoming clogged, and had no issues to almost a year later when a P0420 code came on. Eventually after dealing with some aftermarkets that didn't work, I replaced it with a Catco (OEM assuming?)Cat about a year ago. Once again, I have a P0420 code again. The o2 sensors are fairly new. I did have some autolite plugs installed on my last tuneup. I have recently replaced them with AC delco's and it seems to run a little better, especially when the engine is cold. Why am I burning through cats? What should I look for?
have the same problem?
Tuesday, November 15th, 2011 AT 3:45 PM