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ClubLexus - Lexus Forum Discussion
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Threads Tagged with
p0420
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Threads Tagged with
p0420
Thread / Thread Starter
Last Post
Replies
Views
Forum
Any DIY tips for replacing rear catalytic converter?
jeremy93ls
on Dec 11, 2025
Dec 16, 2025
10:21 AM
by
jkayca
9
562
ES - 1st to 6th Gen (1990-2018)
GS300 cat problem
popek31
on Jul 20, 2017
Sep 26, 2023
03:03 PM
by
canatto
8
11,126
GS - 3rd Gen (2006-2011)
Live data O2 readings and code P0420
1stock2is
on Sep 1, 2023
Sep 1, 2023
01:17 PM
by
1stock2is
0
910
IS - 2nd Gen (2006-2013)
P0420 VSC Light & Wheel Speed Sensors C0200, C0205 C0215
brcollings
on Aug 20, 2018
Jun 17, 2023
09:57 PM
by
Winslow96
1
3,861
IS - 2nd Gen (2006-2013)
Replaced cats on both sides, still getting P0420
Gmoney32
on May 20, 2023
May 20, 2023
07:10 AM
by
Gmoney32
0
700
LX - 1st and 2nd Gen (1996-2007)
AWD, VSC alarms with Codes P0420 and P0430
(
1
2
)
clyde1952
on Oct 22, 2013
Mar 16, 2023
01:55 PM
by
Rxlexus350
23
16,777
RX - 3rd Gen (2010-2015)
2004 RX330 catalytic converter issue P0420
(
1
2
)
djensen623
on May 3, 2011
Jan 23, 2023
01:04 PM
by
vitieubao
18
52,940
RX - 2nd Gen (2004-2009)
2004 rx 330 - P0430 code
(
1
2
)
soda7o
on Oct 6, 2011
Oct 9, 2021
07:12 AM
by
artfelt
16
60,557
RX - 2nd Gen (2004-2009)
Smog Test Soon - 2003 ES300, Code P0420
LanceLink
on Jan 11, 2020
Jan 12, 2020
12:05 PM
by
Arsenii
3
703
ES - 1st to 6th Gen (1990-2018)
Check engine light p0420 code
Jweb2
on Dec 20, 2019
Dec 20, 2019
08:10 PM
by
Byprodrive
8
19,603
GS - 4th Gen (2013-2020)
Check engine, trac off and vsc light on at same time, have error codes! read on...
DIYDD
on May 22, 2017
Oct 2, 2019
10:11 PM
by
Richardsr
11
8,719
ES - 1st to 6th Gen (1990-2018)
P0430 and pending P0420
Orion1019
on Jan 28, 2019
Jan 28, 2019
04:05 PM
by
Orion1019
0
1,001
IS - 2nd Gen (2006-2013)
Nagging P0430 (and now a pending P0420 too!) 2004 ES330
mjbtn
on Dec 28, 2018
Jan 3, 2019
06:03 PM
by
Nad1370
8
2,265
ES - 1st to 6th Gen (1990-2018)
My Journey to solve the P0420 error - NOT RESOLVED!
myculito
on Oct 7, 2018
Oct 16, 2018
01:38 PM
by
myculito
10
6,367
IS - 2nd Gen (2006-2013)
ES 300 P0420 issue - fixed
satiger
on Sep 16, 2018
Oct 9, 2018
05:57 AM
by
ArmyofOne
8
2,890
ES - 1st to 6th Gen (1990-2018)
VSC and Cel on P0420 code catalyst threshold
mvrod
on Sep 29, 2018
Oct 3, 2018
02:24 PM
by
mvrod
3
1,432
IS - 2nd Gen (2006-2013)
RX300 01 Transmission gears slipping help please
zer0xhdx01
on Oct 21, 2017
Nov 5, 2017
08:25 PM
by
zer0xhdx01
3
2,626
RX - 1st Gen (1999-2003)
ES300 1999 addressing P1354 on heels of P0446 on heels of P0420
blckphillp
on Sep 22, 2016
Feb 22, 2017
09:09 PM
by
blckphillp
10
3,493
ES - 1st to 6th Gen (1990-2018)
Question on Codes p1354 and P0420
bronco2454
on Aug 4, 2012
Nov 27, 2016
07:04 PM
by
burteboy
4
2,724
ES - 1st to 6th Gen (1990-2018)
Can I use spacers on my downstream 02 sensor?
ssgi4in12
on Nov 14, 2016
Nov 14, 2016
07:55 AM
by
JAB
1
1,566
RX - 1st Gen (1999-2003)
Code p0420 and interesting turn aorund.....
satiger
on Feb 16, 2010
Nov 29, 2015
11:25 AM
by
azcat90
7
11,591
ES - 1st to 6th Gen (1990-2018)
Need help -Error Codes on ls400 1998 - p0420, p1126, p1129
secolor
on Sep 19, 2015
Sep 19, 2015
02:31 PM
by
secolor
0
2,088
LS - 1st and 2nd Gen (1990-2000)
Code P0420. Bad Catalytic or O2 sensor?
bb2tosc
on Jul 23, 2015
Jul 29, 2015
03:34 PM
by
3L4jzz31
2
4,901
SC - 1st Gen (1992-2000)
2001 GS300 P0420 and P0430
20012003rx
on Jun 1, 2015
Jun 13, 2015
10:22 AM
by
Mcon
6
6,762
GS - 2nd Gen (1998-2005)
P0330 & P0420 Appear after O2 sensors replaced (RX300)
RyanBill
on Feb 6, 2015
Feb 11, 2015
11:01 AM
by
RayN
5
4,779
RX - 1st Gen (1999-2003)
P0420!! What does this mean?
(
1
2
)
Kumar350
on Apr 17, 2013
Nov 16, 2014
09:03 AM
by
Bichon
26
13,180
IS - 2nd Gen (2006-2013)
2005 gx470 obd11 p0420 p0430
hamedmoosa
on Aug 15, 2014
Sep 8, 2014
03:27 PM
by
470SNC
7
18,816
GX - 1st Gen (2003-2009)
Please need help regarding 2006 Lexus GS 300 OBD Codees
goodbadboy
on Aug 14, 2014
Aug 15, 2014
05:58 AM
by
goodbadboy
4
4,633
GS - 3rd Gen (2006-2011)
What if I remove cat converters? - no emissions control here
(
1
2
)
Eliaquim
on Jun 12, 2014
Jul 9, 2014
12:57 PM
by
Eliaquim
16
10,419
RX - 2nd Gen (2004-2009)
P0420 & P0430 Help please
(
1
2
)
srob817
on Jun 7, 2014
Jun 20, 2014
10:51 PM
by
aneidiaz
23
15,514
GS - 2nd Gen (1998-2005)
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