OBD2 CODE P0420
07-13-2008, 10:03 AM
#1
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
OBD2 CODE P0420
I AM HOPING IF ANYBODY COULD TELL ME MORE INFO ABOUT THIS CODE: P0420 BANK 1 CATALYST EFFICIENCY BELOW THRESHOLD. I LOOKED UP FOR SOME INFO BUT CANT REALLY FIND THE EXACT SOLUTION. HOPEFULLY SOMEONE COULD HELP. THANKS.
07-13-2008, 10:46 AM
#4
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Re: OBD2 CODE P0420 (abusedhusband)
CIVIC 99. STOCK MOTOR...D16. 93K MILES. MOTOR RUNS GOOD. CHECK ENGINE LIGHT TURNS ON BUT THEN IT TURNS OFF.
Modified by JDMPHILEP91 at 1:10 PM 7/13/2008
Modified by JDMPHILEP91 at 1:10 PM 7/13/2008
07-13-2008, 05:15 PM
#6
Junior Member
iTrader: (1)
Join Date: Mar 2007
Location: bordentown, nj, us
Posts: 501
Likes: 0
Received 0 Likes
on
0 Posts
Re: OBD2 CODE P0420 (JDMPHILEP91)
if you have a good scanner and can watch data on it. moniter the front and rear o2 sensers. if the rear mimics the front your catalytic converter is bad. you could start cheap first with a 3 part top engine cleaner if you dont have a scanner. if that dont work then you will need a converter.
07-13-2008, 05:31 PM
#7
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Re: OBD2 CODE P0420 (abusedhusband)
well it cant be my converter. because i just bought a brand new one. ill tell my homie to use the scanner at his shop. thanx for the help.
Trending Topics
07-13-2008, 05:46 PM
#9
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Re: OBD2 CODE P0420 (K i l l a B e e.)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K i l l a B e e. »</TD></TR><TR><TD CLASS="quote">or go to autozone and rent it for freeeeee.</TD></TR></TABLE>
the obd2 scanners from auto zone dont have a lot of futures.
the obd2 scanners from auto zone dont have a lot of futures.
07-13-2008, 05:58 PM
#10
Junior Member
Join Date: Jul 2008
Location: Alabaster, Al, USA
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
PO420 is the catalitic converter not burning the gases like it is suppose to. If you have already installed a new converter it could be the O2 sensor it self or a mechanical issue. Make sure you don't have any vacumm leaks and your fuel pressure is right. Also make sure the front O2 sensor is switching like it needs to.
07-13-2008, 06:15 PM
#11
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Re: (150sol)
well hopefully is not the catalytic converter. which i doubt it will be. if it will be the 02 sensor then in the scanner it will appear 02 sensor. so i doubt that too. i dont have no vaccumm leaks and fuel pressure is ok. thanks for the help though.
07-14-2008, 08:40 PM
#15
Re: (JDMPHILEP91)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMPHILEP91 »</TD></TR><TR><TD CLASS="quote">well hopefully is not the catalytic converter. which i doubt it will be. if it will be the 02 sensor then in the scanner it will appear 02 sensor. so i doubt that too. i dont have no vaccumm leaks and fuel pressure is ok. thanks for the help though.</TD></TR></TABLE>
I think it's the cat. if it's not a cat, its gonna be the o2 sensor.
I think it's the cat. if it's not a cat, its gonna be the o2 sensor.
07-15-2008, 07:44 AM
#16
Junior Member
Join Date: Sep 2004
Location: Valley Springs, CA, USA
Posts: 124
Likes: 0
Received 0 Likes
on
0 Posts
Re: (K i l l a B e e.)
if you can t get a scanner get a multimeter and ur voltage on your front o2 sensor should run between .1 -.9 mV and then check the rear o2 sensor it should stay at a constant voltage if it toggles like the first one your cat is not clearing up the gasses like it should and it is bad whether it is new or not
07-15-2008, 02:12 PM
#17
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Re: (jdm94ej1)
alright. thanks guys. i havent had time to check it out. but hopefully its the o2 senor...which i doubt.
what would be the causes of why the cat is not burnin up the gasses?
what would be the causes of why the cat is not burnin up the gasses?
07-15-2008, 03:32 PM
#18
Junior Member
Join Date: Jul 2008
Location: Alabaster, Al, USA
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
From the schools I've gone to say that your converter should last the life of the car as long you keep up the maintance. What causes them (O2) to bad is the heat of the exhaust. In the maintance manuals they are supposed to be changed at 50k intervals. Over time they will have a build up on them slowing there abillity of reading the gasses. There mostly at fault due to dirty air filters or free flow(K&N) type, fuel filter restriction, and oil consumption. No body ever changes them till they have problems. At my shop when a converter does show defective it also gets O2 sensors and fuel filter.
07-15-2008, 07:49 PM
#19
Junior Member
Thread Starter
Join Date: Jun 2008
Location: NATIONAL CITY, CALI
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Re: (150sol)
yea i know that cats are suppose to last the life of the car.
u might of just given me the answer. i have a dirty filter right now...i have to buy another one...i noticed that last week...but i havent had time to change it....so that might be it.
Modified by JDMPHILEP91 at 9:56 PM 7/15/2008
u might of just given me the answer. i have a dirty filter right now...i have to buy another one...i noticed that last week...but i havent had time to change it....so that might be it.
Modified by JDMPHILEP91 at 9:56 PM 7/15/2008
Thread
Thread Starter
Forum
Replies
Last Post
MBlake55
Honda Civic / Del Sol (1992 - 2000)
27
03-01-2013 06:50 AM
b16bavital
Honda Accord (1990 - 2002)
2
11-28-2007 05:31 AM
