P0420 Help
03-10-2011, 03:36 PM
#1
Registered User
Thread Starter
Join Date: Oct 2006
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
P0420 Help
I am looking for a little advice here. 04 RX8 threw a P0420 (Cat) code over the weekend. I was reading that it could possibly be the O2 sensors or the cat itself. What is the best way to test what is truly wrong? I don't want to replace one thing have have it be the other.
03-10-2011, 04:18 PM
#2
Administrator
iTrader: (7)
unbolt the cat, look inside. If there's pieces bouncing around, it's the cat.
03-18-2011, 04:03 PM
#6
Since you don't want to search....
http://www.finishlineperformance.com...4-08-1924g.pdf
Read the first & second page thoroughly to see how Mazda techs check the cat converter using Mode 6 data.
And here's a wiki link to Mode 6 data:
http://en.wikipedia.org/wiki/On-boar...e_of_Operation
http://www.finishlineperformance.com...4-08-1924g.pdf
Read the first & second page thoroughly to see how Mazda techs check the cat converter using Mode 6 data.
And here's a wiki link to Mode 6 data:
http://en.wikipedia.org/wiki/On-boar...e_of_Operation
03-18-2011, 10:41 PM
#7
Registered User
Join Date: Apr 2008
Location: Chicago, IL
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
visual cat inspection
if you r going to look inside the cat pull the o2 sensor and look thru the hole.
when mine failed it looked normal thru the end but was completely melted
inside.
when mine failed it looked normal thru the end but was completely melted
inside.
Thread
Thread Starter
Forum
Replies
Last Post
