Catalytic Converter p0420
#1
Catalytic Converter p0420
So I got the check VSC light with the code P0420 Catalyst System Efficiency Below Threshold (Bank 1) took the car to the shop and they said my catalytic converters are bad and it need to be replaced, was wondering if the original cats are cover under warrant so I can get the job done back at the lexus dealership( gotta save some money times are hard ). If anyone has insight or advise for me feel free to help me out
car is Is250 awd 2008 with 51000 mileage
To make situations even worst my inspection sticker is expired, ate one ticket alrdy getting an EXPENSIVE cup of coffee ..not interested in another one
car is Is250 awd 2008 with 51000 mileage
To make situations even worst my inspection sticker is expired, ate one ticket alrdy getting an EXPENSIVE cup of coffee ..not interested in another one
#4
Super Moderator
Often the P0420 code on our cars happens when small holes develop in the Y-pipe ahead of the catalytic converters. The holes are difficult to see, since they happen underneath the heat shield, but you'll notice that the car is a bit noisier; particularly noticeable when starting the car in a garage with the driver's window open. In either case, you should be covered by the emissions warranty.
#5
Often the P0420 code on our cars happens when small holes develop in the Y-pipe ahead of the catalytic converters. The holes are difficult to see, since they happen underneath the heat shield, but you'll notice that the car is a bit noisier; particularly noticeable when starting the car in a garage with the driver's window open. In either case, you should be covered by the emissions warranty.
#6
Lexus Champion
got the same code and problem but i am out of warranty by over a year and at least 10k miles over. took it into dealer, they want $2k to fix and garage wants $1.3k to replace cc (talked to them over the phone only). any advice on what i should do from here? yes it does sound a bit louder in my garage, should i have it inspected by the garage?
i'd rather not pay $2k for replacement repairs that may not be necessary and i'm not happy with my dealership right now since they tried to hook me with the airbag light until i complained to lexus. code has been cleared several times but it keeps coming back on (check vsc) and i've tightened the gas cap. thoughts?
in the meantime, i'll keep searching other threads.
p.s. i can't remember if i have p0420 or p0430.
i'd rather not pay $2k for replacement repairs that may not be necessary and i'm not happy with my dealership right now since they tried to hook me with the airbag light until i complained to lexus. code has been cleared several times but it keeps coming back on (check vsc) and i've tightened the gas cap. thoughts?
in the meantime, i'll keep searching other threads.
p.s. i can't remember if i have p0420 or p0430.
Last edited by kensteele; 09-27-14 at 06:50 PM.
Trending Topics
#8
Driver School Candidate
iTrader: (5)
Join Date: Mar 2013
Location: NY
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
I have the same issue. I paid for 2 days access to the Toyota tech information site. Downloaded couple pdfs to troubleshoot the issue to find out exactly what's the problem and also ordered a chinese techstream kit from amazon. PM if you guys need help. May decide to create a DIY when I'm done.
#9
Pole Position
iTrader: (1)
Join Date: Jul 2011
Location: Houston, TX
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
The downstream sensor is reporting different frequencies from the upstream sensor on that bank.
My 0420 code was not from holes, but from a clogged cat after a decarb at 90K miles.
I gutted the stock cats, used 90 degree 02 non-foulers with the stock o2 sensors.
$30 for the foulers
$100 to my tech
Passed inspection in Tx, no codes since.
My 0420 code was not from holes, but from a clogged cat after a decarb at 90K miles.
I gutted the stock cats, used 90 degree 02 non-foulers with the stock o2 sensors.
$30 for the foulers
$100 to my tech
Passed inspection in Tx, no codes since.
#10
Driver School Candidate
The downstream sensor is reporting different frequencies from the upstream sensor on that bank.
My 0420 code was not from holes, but from a clogged cat after a decarb at 90K miles.
I gutted the stock cats, used 90 degree 02 non-foulers with the stock o2 sensors.
$30 for the foulers
$100 to my tech
Passed inspection in Tx, no codes since.
My 0420 code was not from holes, but from a clogged cat after a decarb at 90K miles.
I gutted the stock cats, used 90 degree 02 non-foulers with the stock o2 sensors.
$30 for the foulers
$100 to my tech
Passed inspection in Tx, no codes since.
Thread
Thread Starter
Forum
Replies
Last Post
vietstuh
LS - 1st and 2nd Gen (1990-2000)
8
03-02-11 06:53 PM
NYC ES3
IS - 2nd Gen (2006-2013)
4
03-14-09 08:30 AM