I’m not sure where this would go on the forum, but my car runs like crap. I just got this 00’ civic with 170k and ran great for the last month until the last 3 days. It wont rev over 3.5k rpm and seems like its in a limp mode. It will not activate vtec and the check engine light is intermitent. The code comes up as - P0420 Catalyst system efficiency below threshold (Bank 1). I am not familiar with hondas and would like any insight anyone may have on a repair.
My thought from searching is a clogged or bad converter? Any opinions is appreciated.Thanks.
UPDATE: Oil level and pressure is normal, o2 is good.
Cat doesn’t sound like any material is loose or broken inside, but the car did stall today while driving. It started up but ran rough with no exhaust tone and then died again. It restarted i gave it a rev and took off like normal.???
↑ Its probably the cat like you said, my old tracker did the same thing the honeycomb came loose inside and it was clogging it. Take it off and give it a look. I would go to o2 sensors if if checks out.
i took it on my phone ill get a better one later, its the honeycomb melted and in chunks. Theres also a fibrous band of some sort that was in there and just allot of broken material.