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CorvetteForum - Chevrolet Corvette Forum Discussion
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Threads Tagged with
p0420
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Forum
[Z06]
There is now a TSB for the check engine light/cat converter issue
(
1
2
)
vette ruminator
on Mar 18, 2009
Aug 31, 2020
08:35 PM
by
Nasti12
23
7,985
C6 Corvette ZR1 & Z06
'vettes throwing a code: P0420
And7Baller
on May 1, 2009
Feb 25, 2020
10:09 AM
by
jjc508520
14
17,164
C5 Tech
code help P0420,P0430
realcanuk
on Jul 24, 2011
Mar 18, 2016
09:50 AM
by
Dude_man
17
12,928
C6 Forced Induction/Nitrous
2006 C6 CEL Code P0420
TheMachine
on Apr 25, 2012
Apr 25, 2012
11:41 PM
by
TheMachine
4
4,412
C6 Tech/Performance
just Installed "KOOKS" Headers Today
(
1
2
)
jpee
on Oct 7, 2011
Oct 10, 2011
09:08 AM
by
SuperchargedStroker
23
2,512
C6 Tech/Performance
Help with Engine codes
vic82
on Jul 31, 2011
Aug 2, 2011
05:05 PM
by
Thule
2
1,043
C6 Scan & Tune
Engine light is on with a DTC code or P0420
dmmercer
on Feb 22, 2011
May 10, 2011
07:35 PM
by
BRISLS1
3
1,341
C5 Scan & Tune
Catalyst System Efficiency Below Threshold (Bank 1)
dogfish246
on Mar 19, 2011
Mar 20, 2011
12:16 PM
by
96GS#007
3
2,521
C4 Tech/Performance
P0420/p0430
SSGT's99vette
on Feb 4, 2011
Feb 8, 2011
08:10 AM
by
SSGT's99vette
6
2,457
C4 Tech/Performance
Have O2 codes P0420 & P0430 need help!!
1badzo6
on Jul 13, 2010
Dec 14, 2010
09:58 PM
by
Joe_G
9
3,627
C6 Tech/Performance
P0420 code
papafrancisco
on Dec 7, 2010
Dec 7, 2010
07:44 PM
by
papafrancisco
0
680
C4 General Discussion
P0300 code and flashing CEL
Aerovette
on Oct 4, 2010
Oct 4, 2010
03:23 PM
by
dougbfresh
4
3,635
C5 Tech
Riding dirty with the CEL
jsims002
on Sep 20, 2010
Sep 20, 2010
11:50 AM
by
jsims002
3
1,000
C6 Corvette General Discussion
P0430 Catalyst System Low Efficiency Bank 2 Code Back
Vette Nut
on Aug 4, 2010
Aug 12, 2010
01:12 PM
by
h8bumps
9
11,844
C6 Tech/Performance
[Z06]
P0420 Code
SziTech
on Jun 23, 2010
Jun 25, 2010
07:18 PM
by
old.hot.rodder
8
9,654
C6 Corvette ZR1 & Z06
[Z06]
My Check Engine Light is on - Code P0420
C6DuffMan
on Jun 18, 2010
Jun 18, 2010
06:57 PM
by
90sundevil
6
5,114
C6 Corvette ZR1 & Z06
P0420 & Freeze Frame
sbontrag@hotmail.com
on May 13, 2010
May 24, 2010
02:42 PM
by
sbontrag@hotmail.com
10
3,178
C5 General
P0303
Fujikura
on Apr 13, 2010
Apr 20, 2010
07:33 PM
by
Y2Kvert4me
14
3,218
C5 Tech
[Z06]
Code Help Needed
slong
on Mar 27, 2010
Mar 28, 2010
01:17 PM
by
slvrzo6
4
707
C5 General
Code po420
MIKE LAZENBY
on Feb 27, 2010
Feb 27, 2010
10:05 PM
by
martysauto
4
2,033
C6 Scan & Tune
[Z06]
P0420 and misfire in cylinder 4 check engine light
drewcorvette
on Jan 16, 2010
Jan 16, 2010
05:56 PM
by
drewcorvette
0
1,076
C6 Corvette ZR1 & Z06
[Z06]
MIL Lamp - P0420 (dealer wants to swap cat)
mr.radon
on Nov 16, 2009
Dec 9, 2009
11:41 PM
by
383vett
15
4,089
C6 Corvette ZR1 & Z06
MIL On Assistance, ID 60 Fail
sbontrag@hotmail.com
on Nov 24, 2009
Nov 26, 2009
12:11 PM
by
sbontrag@hotmail.com
2
2,169
C5 Scan & Tune
P0420 Low Efficiency Bank 1
dogfish246
on Nov 23, 2009
Nov 26, 2009
06:57 AM
by
corvette95
9
3,079
C4 Tech/Performance
P0420-Catalytic Converter-HELP Please
sbontrag@hotmail.com
on Oct 27, 2009
Nov 8, 2009
05:40 PM
by
sbontrag@hotmail.com
10
1,049
C5 General
Must pass emissions! Please help!
nitrod86gt
on Sep 21, 2009
Oct 9, 2009
09:07 AM
by
Ron@Vengeance Racing
17
9,316
C6 Scan & Tune
Check engine light on???
FRED HAMBLE
on Sep 2, 2009
Sep 3, 2009
07:50 PM
by
FRED HAMBLE
2
929
C5 Tech
Wiring harness help needed
b16gsr
on Sep 7, 2008
Aug 6, 2009
05:26 PM
by
kcrick
10
677
C4 General Discussion
P0420 "Catalyst System Efficiency Below
vettezeke
on Jul 25, 2009
Jul 26, 2009
09:37 AM
by
Chevy Guy
4
930
C5 Tech
c5 went crazy
gorghamak
on May 31, 2009
Jun 7, 2009
07:26 AM
by
gorghamak
12
1,409
C5 Tech
[Z06]
Check engine light code P0420? ? for people that had TB performed
lemans
on Jun 1, 2009
Jun 6, 2009
01:56 PM
by
speeding bullet
18
1,334
C6 Corvette ZR1 & Z06
P0420 TWC System Low Efficiency Bank 1
AQWIKZ
on Mar 14, 2009
Mar 14, 2009
11:16 AM
by
AQWIKZ
2
4,386
C5 Tech
kooks long tubes O2 sensors
Bad97ta
on Jan 10, 2008
Sep 23, 2008
10:49 AM
by
mikelam
4
2,565
C5 General
What LT Headers do not give 02 sensor problems?
(
1
2
3
...
Last Page
)
tsts
on Jul 7, 2008
Jul 10, 2008
12:14 PM
by
Mike Mercury
72
3,975
C5 Tech
I am absolutely stumped
(
1
2
3
)
99FRC Newb
on Apr 24, 2008
Apr 30, 2008
10:58 AM
by
99FRC Newb
59
4,424
C5 Tech
Disable P0420 and P0430?
clif
on Apr 3, 2008
Apr 3, 2008
10:31 AM
by
FRCTony
2
3,569
C5 Tech
some help with p0420 and p0430 please
bill mcdonald
on Feb 4, 2008
Mar 4, 2008
08:04 PM
by
flynbya2
15
2,275
C5 Tech
PCM...Code P0420
6SPD98
on Mar 1, 2008
Mar 1, 2008
10:27 PM
by
6SPD98
6
1,915
C5 Scan & Tune
P0420 P0430 Error
BaileyD
on Nov 19, 2007
Nov 19, 2007
05:37 PM
by
Humanoid 2.0
7
885
C5 Tech
P0420 & P0430-need help
bdiddo
on Oct 23, 2007
Oct 26, 2007
01:43 AM
by
bdiddo
9
1,523
C5 Tech
Check Engine Light -- DIC Code P0420
2K4Vert
on Oct 4, 2007
Oct 5, 2007
10:16 AM
by
2K4Vert
3
1,049
C5 Tech
[Z06]
code..P0420
captej
on Sep 16, 2007
Sep 16, 2007
04:17 PM
by
captej
4
780
C6 Corvette ZR1 & Z06
help with engine code PCM 0420
goatjacket
on Aug 26, 2007
Aug 26, 2007
09:34 PM
by
Y2Kvert4me
4
918
C5 Scan & Tune
Headers P0420 Code
toro1966
on Jul 28, 2007
Jul 29, 2007
07:02 PM
by
don.donc
16
4,621
C6 Tech/Performance
code p0430 ?
royski
on Jun 14, 2007
Jun 15, 2007
12:24 AM
by
royski
4
3,851
C5 Tech
What does this code mean? P0420 TWC System Low Efficiency Bank 1
OMG its Jason
on Jun 6, 2007
Jun 7, 2007
06:47 AM
by
trussme
5
7,555
C5 Tech
DTC codes wont clear?
dfwblk2003Z06
on May 30, 2007
May 30, 2007
08:13 AM
by
runamuk
1
1,417
C5 Tech
[Z06]
P0420 Code question....
skeeterJD
on Mar 27, 2007
Mar 28, 2007
04:32 AM
by
BlackZ06
1
505
C5 General
P0420-TWC System Low Efficiency Bank 1 questions...
skeeterJD
on Mar 27, 2007
Mar 27, 2007
05:46 PM
by
skeeterJD
4
863
C5 General
Pcm Code P0430c
atsugidad
on Feb 26, 2007
Mar 22, 2007
08:48 PM
by
cbrf4i1
7
2,168
C5 Tech
[Headers] P0420 cat code - Delete rear O2's or O2 sims?
JR_VETTE
on Oct 2, 2006
Oct 2, 2006
08:22 PM
by
LS6 TECH
4
1,323
C5 Tech
P0420 Code - Bad Cat
billjax
on Sep 23, 2006
Sep 23, 2006
02:14 PM
by
billjax
0
459
C5 Tech
DIC Code P0420
PVHolgado
on Jul 26, 2006
Jul 28, 2006
10:26 AM
by
Billdog350
4
932
C5 Tech
How To Clear Code? P0420?
(
1
2
)
BIGGGIE
on Jul 6, 2006
Jul 10, 2006
09:15 PM
by
BIGGGIE
21
5,254
C6 Tech/Performance
Am I OK to drive back to Canada with these codes??? P0420 & P0430
4GTABODT
on May 17, 2006
May 18, 2006
09:15 AM
by
99 vett babycar
7
878
C5 General
Code Help - P0420, P0430
sgrubbs
on Mar 8, 2006
Mar 8, 2006
01:12 PM
by
rudolph schenker
6
1,676
C5 General
P0420 H C Code
billjax
on Feb 4, 2006
Feb 6, 2006
07:32 PM
by
dpd
7
3,477
C5 Scan & Tune
Code p0410 and engine running rich...
ex-bmw-man
on Jan 17, 2006
Jan 30, 2006
11:45 AM
by
dpd
15
1,337
C5 Tech
code p0420 h c
my1stvette.33
on Sep 7, 2005
Oct 2, 2005
12:44 PM
by
boosted_z06
4
807
C5 Tech
Code Help--P0420 TWC System Low Efficiency Bank 1-A
CCONKLIN1
on Sep 3, 2005
Oct 1, 2005
08:14 PM
by
Greenbeast
9
7,775
C5 Tech
TWC System Low Efficiency Bank 1 code
2003silvercorvette
on Jul 13, 2005
Jul 13, 2005
05:40 PM
by
torchredfrc
3
1,751
C5 Tech
Code P0420 need opinions
FrankTank
on May 4, 2005
May 10, 2005
11:02 PM
by
dvettetech
8
1,852
C5 Scan & Tune
40-BCM and 10-PCM showing codes...
StuzVette
on Jan 11, 2005
Jan 13, 2005
10:18 AM
by
StuzVette
6
6,024
C5 Tech
SES code P0420 (suggestions on replacement cats)
jcook00
on Oct 27, 2004
Oct 27, 2004
06:18 PM
by
SunCr
9
482
C4 Tech/Performance
Headers and P0420
(
1
2
)
Dirty Howie
on Sep 18, 2004
Sep 20, 2004
11:55 PM
by
SLO VETTE
20
1,785
C5 Tech
DTC P0420
Horseshoe Dozer
on May 18, 2004
May 18, 2004
11:56 AM
by
Horseshoe Dozer
2
576
C5 Tech
DTC CODE P0420 (KOOKS HEADERS & HI-FLOW CATS )
DNAST1
on May 9, 2004
May 9, 2004
01:19 PM
by
TT_Vert
1
1,599
C5 Tech
What's code P0420 Low Efficiency Bank mean?
KKu77
on Feb 18, 2004
Feb 19, 2004
10:57 PM
by
KKu77
4
4,069
C5 Tech
PCM codes P0420 & P0430 Replace CATS Anyone have these codes?
speedyc5
on Feb 1, 2004
Feb 7, 2004
10:48 AM
by
speedyc5
11
2,152
C5 Tech
I need some help with code P0420 H C .. LS1 edit ?
YOULLUZ
on Jun 19, 2003
Jun 21, 2003
12:53 PM
by
YOULLUZ
2
704
C5 Scan & Tune
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