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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 03-18-2009
08-31-2020
08:35 PM
by
Nasti12
23
7,043
C6 Corvette ZR1 & Z06
'vettes throwing a code: P0420
And7Baller
on 05-01-2009
02-25-2020
10:09 AM
by
jjc508520
14
15,548
C5 Tech
code help P0420,P0430
realcanuk
on 07-24-2011
03-18-2016
09:50 AM
by
Dude_man
17
12,569
C6 Forced Induction/Nitrous
2006 C6 CEL Code P0420
TheMachine
on 04-25-2012
04-25-2012
11:41 PM
by
TheMachine
4
4,289
C6 Tech/Performance
just Installed "KOOKS" Headers Today
(
1
2
)
jpee
on 10-07-2011
10-10-2011
09:08 AM
by
SuperchargedStroker
23
2,270
C6 Tech/Performance
Help with Engine codes
vic82
on 07-31-2011
08-02-2011
05:05 PM
by
Thule
2
968
C6 Scan & Tune
Engine light is on with a DTC code or P0420
dmmercer
on 02-22-2011
05-10-2011
07:35 PM
by
BRISLS1
3
1,275
C5 Scan & Tune
Catalyst System Efficiency Below Threshold (Bank 1)
dogfish246
on 03-19-2011
03-20-2011
12:16 PM
by
96GS#007
3
2,230
C4 Tech/Performance
P0420/p0430
SSGT's99vette
on 02-04-2011
02-08-2011
08:10 AM
by
SSGT's99vette
6
2,230
C4 Tech/Performance
Have O2 codes P0420 & P0430 need help!!
1badzo6
on 07-13-2010
12-14-2010
09:58 PM
by
Joe_G
9
3,533
C6 Tech/Performance
P0420 code
papafrancisco
on 12-07-2010
12-07-2010
07:44 PM
by
papafrancisco
0
617
C4 General Discussion
P0300 code and flashing CEL
Aerovette
on 10-04-2010
10-04-2010
03:23 PM
by
dougbfresh
4
3,246
C5 Tech
Riding dirty with the CEL
jsims002
on 09-20-2010
09-20-2010
11:50 AM
by
jsims002
3
929
C6 Corvette General Discussion
P0430 Catalyst System Low Efficiency Bank 2 Code Back
Vette Nut
on 08-04-2010
08-12-2010
01:12 PM
by
h8bumps
9
11,096
C6 Tech/Performance
[Z06]
P0420 Code
SziTech
on 06-23-2010
06-25-2010
07:18 PM
by
old.hot.rodder
8
8,661
C6 Corvette ZR1 & Z06
[Z06]
My Check Engine Light is on - Code P0420
C6DuffMan
on 06-18-2010
06-18-2010
06:57 PM
by
90sundevil
6
4,950
C6 Corvette ZR1 & Z06
P0420 & Freeze Frame
sbontrag@hotmail.com
on 05-13-2010
05-24-2010
02:42 PM
by
sbontrag@hotmail.com
10
2,751
C5 General
P0303
Fujikura
on 04-13-2010
04-20-2010
07:33 PM
by
Y2Kvert4me
14
2,812
C5 Tech
[Z06]
Code Help Needed
slong
on 03-27-2010
03-28-2010
01:17 PM
by
slvrzo6
4
630
C5 General
Code po420
MIKE LAZENBY
on 02-27-2010
02-27-2010
10:05 PM
by
martysauto
4
1,921
C6 Scan & Tune
[Z06]
P0420 and misfire in cylinder 4 check engine light
drewcorvette
on 01-16-2010
01-16-2010
05:56 PM
by
drewcorvette
0
1,012
C6 Corvette ZR1 & Z06
[Z06]
MIL Lamp - P0420 (dealer wants to swap cat)
mr.radon
on 11-16-2009
12-09-2009
11:41 PM
by
383vett
15
3,950
C6 Corvette ZR1 & Z06
MIL On Assistance, ID 60 Fail
sbontrag@hotmail.com
on 11-24-2009
11-26-2009
12:11 PM
by
sbontrag@hotmail.com
2
2,056
C5 Scan & Tune
P0420 Low Efficiency Bank 1
dogfish246
on 11-23-2009
11-26-2009
06:57 AM
by
corvette95
9
2,850
C4 Tech/Performance
P0420-Catalytic Converter-HELP Please
sbontrag@hotmail.com
on 10-27-2009
11-08-2009
05:40 PM
by
sbontrag@hotmail.com
10
960
C5 General
Must pass emissions! Please help!
nitrod86gt
on 09-21-2009
10-09-2009
09:07 AM
by
Ron@Vengeance Racing
17
8,690
C6 Scan & Tune
Check engine light on???
FRED HAMBLE
on 09-02-2009
09-03-2009
07:50 PM
by
FRED HAMBLE
2
839
C5 Tech
Wiring harness help needed
b16gsr
on 09-07-2008
08-06-2009
05:26 PM
by
kcrick
10
607
C4 General Discussion
P0420 "Catalyst System Efficiency Below
vettezeke
on 07-25-2009
07-26-2009
09:37 AM
by
Chevy Guy
4
857
C5 Tech
c5 went crazy
gorghamak
on 05-31-2009
06-07-2009
07:26 AM
by
gorghamak
12
1,334
C5 Tech
[Z06]
Check engine light code P0420? ? for people that had TB performed
lemans
on 06-01-2009
06-06-2009
01:56 PM
by
speeding bullet
18
1,251
C6 Corvette ZR1 & Z06
P0420 TWC System Low Efficiency Bank 1
AQWIKZ
on 03-14-2009
03-14-2009
11:16 AM
by
AQWIKZ
2
4,132
C5 Tech
kooks long tubes O2 sensors
Bad97ta
on 01-10-2008
09-23-2008
10:49 AM
by
mikelam
4
2,244
C5 General
What LT Headers do not give 02 sensor problems?
(
1
2
3
...
Last Page
)
tsts
on 07-07-2008
07-10-2008
12:14 PM
by
Mike Mercury
72
3,602
C5 Tech
I am absolutely stumped
(
1
2
3
)
99FRC Newb
on 04-24-2008
04-30-2008
10:58 AM
by
99FRC Newb
59
4,175
C5 Tech
Disable P0420 and P0430?
clif
on 04-03-2008
04-03-2008
10:31 AM
by
FRCTony
2
2,944
C5 Tech
some help with p0420 and p0430 please
bill mcdonald
on 02-04-2008
03-04-2008
08:04 PM
by
flynbya2
15
1,982
C5 Tech
PCM...Code P0420
6SPD98
on 03-01-2008
03-01-2008
10:27 PM
by
6SPD98
6
1,768
C5 Scan & Tune
P0420 P0430 Error
BaileyD
on 11-19-2007
11-19-2007
05:37 PM
by
Humanoid 2.0
7
830
C5 Tech
P0420 & P0430-need help
bdiddo
on 10-23-2007
10-26-2007
01:43 AM
by
bdiddo
9
1,220
C5 Tech
Check Engine Light -- DIC Code P0420
2K4Vert
on 10-04-2007
10-05-2007
10:16 AM
by
2K4Vert
3
966
C5 Tech
[Z06]
code..P0420
captej
on 09-16-2007
09-16-2007
04:17 PM
by
captej
4
727
C6 Corvette ZR1 & Z06
help with engine code PCM 0420
goatjacket
on 08-26-2007
08-26-2007
09:34 PM
by
Y2Kvert4me
4
868
C5 Scan & Tune
Headers P0420 Code
toro1966
on 07-28-2007
07-29-2007
07:02 PM
by
don.donc
16
4,292
C6 Tech/Performance
code p0430 ?
royski
on 06-14-2007
06-15-2007
12:24 AM
by
royski
4
3,647
C5 Tech
What does this code mean? P0420 TWC System Low Efficiency Bank 1
OMG its Jason
on 06-06-2007
06-07-2007
06:47 AM
by
trussme
5
5,926
C5 Tech
DTC codes wont clear?
dfwblk2003Z06
on 05-30-2007
05-30-2007
08:13 AM
by
runamuk
1
1,292
C5 Tech
[Z06]
P0420 Code question....
skeeterJD
on 03-27-2007
03-28-2007
04:32 AM
by
BlackZ06
1
461
C5 General
P0420-TWC System Low Efficiency Bank 1 questions...
skeeterJD
on 03-27-2007
03-27-2007
05:46 PM
by
skeeterJD
4
764
C5 General
Pcm Code P0430c
atsugidad
on 02-26-2007
03-22-2007
08:48 PM
by
cbrf4i1
7
1,986
C5 Tech
[Headers] P0420 cat code - Delete rear O2's or O2 sims?
JR_VETTE
on 10-02-2006
10-02-2006
08:22 PM
by
LS6 TECH
4
1,232
C5 Tech
P0420 Code - Bad Cat
billjax
on 09-23-2006
09-23-2006
02:14 PM
by
billjax
0
405
C5 Tech
DIC Code P0420
PVHolgado
on 07-26-2006
07-28-2006
10:26 AM
by
Billdog350
4
833
C5 Tech
How To Clear Code? P0420?
(
1
2
)
BIGGGIE
on 07-06-2006
07-10-2006
09:15 PM
by
BIGGGIE
21
4,627
C6 Tech/Performance
Am I OK to drive back to Canada with these codes??? P0420 & P0430
4GTABODT
on 05-17-2006
05-18-2006
09:15 AM
by
99 vett babycar
7
797
C5 General
Code Help - P0420, P0430
sgrubbs
on 03-08-2006
03-08-2006
01:12 PM
by
rudolph schenker
6
1,588
C5 General
P0420 H C Code
billjax
on 02-04-2006
02-06-2006
07:32 PM
by
dpd
7
3,216
C5 Scan & Tune
Code p0410 and engine running rich...
ex-bmw-man
on 01-17-2006
01-30-2006
11:45 AM
by
dpd
15
1,136
C5 Tech
code p0420 h c
my1stvette.33
on 09-07-2005
10-02-2005
12:44 PM
by
boosted_z06
4
706
C5 Tech
Code Help--P0420 TWC System Low Efficiency Bank 1-A
CCONKLIN1
on 09-03-2005
10-01-2005
08:14 PM
by
Greenbeast
9
6,880
C5 Tech
TWC System Low Efficiency Bank 1 code
2003silvercorvette
on 07-13-2005
07-13-2005
05:40 PM
by
torchredfrc
3
1,244
C5 Tech
Code P0420 need opinions
FrankTank
on 05-04-2005
05-10-2005
11:02 PM
by
dvettetech
8
1,777
C5 Scan & Tune
40-BCM and 10-PCM showing codes...
StuzVette
on 01-11-2005
01-13-2005
10:18 AM
by
StuzVette
6
4,852
C5 Tech
SES code P0420 (suggestions on replacement cats)
jcook00
on 10-27-2004
10-27-2004
06:18 PM
by
SunCr
9
427
C4 Tech/Performance
Headers and P0420
(
1
2
)
Dirty Howie
on 09-18-2004
09-20-2004
11:55 PM
by
SLO VETTE
20
1,539
C5 Tech
DTC P0420
Horseshoe Dozer
on 05-18-2004
05-18-2004
11:56 AM
by
Horseshoe Dozer
2
513
C5 Tech
DTC CODE P0420 (KOOKS HEADERS & HI-FLOW CATS )
DNAST1
on 05-09-2004
05-09-2004
01:19 PM
by
TT_Vert
1
1,513
C5 Tech
What's code P0420 Low Efficiency Bank mean?
KKu77
on 02-18-2004
02-19-2004
10:57 PM
by
KKu77
4
3,052
C5 Tech
PCM codes P0420 & P0430 Replace CATS Anyone have these codes?
speedyc5
on 02-01-2004
02-07-2004
10:48 AM
by
speedyc5
11
2,073
C5 Tech
I need some help with code P0420 H C .. LS1 edit ?
YOULLUZ
on 06-19-2003
06-21-2003
12:53 PM
by
YOULLUZ
2
656
C5 Scan & Tune
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