Check Engine P0420
Thread Starter
Racer
Joined: May 2003
Posts: 294
Likes: 0
From: Albany OR
Check Engine P0420
Ok, so I didn't like the Borla's that came with the car, so I replaced them with a factory system until I figure out what I want. A couple of days after installing the factory mufflers I trip a Check Engine light with a P0420 cat/o2 problem. I have reset the ecu to try and get it to re-learn the stock flow characteristics, but I keep tripping the light. Questions: Will the computer ever re-learn and stop tripping? Should I just get some o2 sims? Do you really think my cats are failing? This light is starting to **** me off. :banghead:
Thanks for the help
Bill
Thanks for the help
Bill
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Re: Check Engine P0420 (vettatude)
You could get o2 sims, however you may want to check, with autotap, if your o2 sensors are switching. If you have a bad o2 then decide if you want to replace it or sim it.
