P0420 definitive troubleshoot
#1
Honda-Tech Member
Thread Starter
Join Date: Jul 2017
Location: Vermont, USA
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
P0420 definitive troubleshoot
Hello,
My 2002 Honda Civic SI sat without running for five years. Last summer I changed the alternator and the throttle body and got it running again. Within a few months it starting throwing P0420. The car now has 195k miles. I changed the middle O2 sensor and that didn't help. Does this mean I need a new catalytic converter? Is there any thing else to check?
Thanks,
Thomas
My 2002 Honda Civic SI sat without running for five years. Last summer I changed the alternator and the throttle body and got it running again. Within a few months it starting throwing P0420. The car now has 195k miles. I changed the middle O2 sensor and that didn't help. Does this mean I need a new catalytic converter? Is there any thing else to check?
Thanks,
Thomas
#2
Honda-Tech Member
Re: P0420 definitive troubleshoot
Hello,
My 2002 Honda Civic SI sat without running for five years. Last summer I changed the alternator and the throttle body and got it running again. Within a few months it starting throwing P0420. The car now has 195k miles. I changed the middle O2 sensor and that didn't help. Does this mean I need a new catalytic converter? Is there any thing else to check?
Thanks,
Thomas
My 2002 Honda Civic SI sat without running for five years. Last summer I changed the alternator and the throttle body and got it running again. Within a few months it starting throwing P0420. The car now has 195k miles. I changed the middle O2 sensor and that didn't help. Does this mean I need a new catalytic converter? Is there any thing else to check?
Thanks,
Thomas
Keep in mind, burning oil will ruin your cat.
Thread
Thread Starter
Forum
Replies
Last Post
titantx
Honda Civic / Del Sol (1992 - 2000)
2
01-27-2014 11:02 PM
Ran4it2
Honda Civic / Del Sol (1992 - 2000)
7
05-08-2008 03:29 PM
diymarc
Honda Accord (1990 - 2002)
3
08-27-2002 09:13 PM