Threads Tagged with p0420

0430, 1996, bad, bank, c5, c6, cat, chevy, code, codes, corvette, p0420, p0430, twc, vette, z06

'vettes throwing a code: P0420

And7Baller on 05-01-2009

02-25-2020 10:09 AM
by jjc508520

14

15,524

C6 Forced Induction/Nitrous

0420, 0430, 1996, 2005, c5, cel, code, codes, corvette, edelbrock, p0420, p0430, po420, supercharger, zo6

code help P0420,P0430

realcanuk on 07-24-2011

03-18-2016 09:50 AM
by Dude_man

17

12,556

2006, bulletin, c6, cel, code, corvette, gm, p0420, po420, service, z06

2006 C6 CEL Code P0420

TheMachine on 04-25-2012

04-25-2012 11:41 PM
by TheMachine

4

4,288

99, c6, cat, corvette, forum, header, headers, hiflow, installing, kooks, ls2, muffler, p0420, po420, straight

just Installed "KOOKS" Headers Today

(

1 2)

jpee on 10-07-2011

10-10-2011 09:08 AM
by SuperchargedStroker

23

2,268

c6, code, codes, corvette, engine, forum, p0420, p0430, p2a01

Help with Engine codes

vic82 on 07-31-2011

08-02-2011 05:05 PM
by Thule

2

968

C6 Scan & Tune

c5, catalyst, code, corvette, diagnostic, dtc, efficiency, forum, low, p0420, system, trouble

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

1996, bank, bank1, catalyst, chevy, corvette, efficiency, exhaust, lt1, normal, p0420, performance, system, threshhold, threshold

Catalyst System Efficiency Below Threshold (Bank 1)

dogfish246 on 03-19-2011

03-20-2011 12:16 PM
by 96GS#007

3

2,229

P0420/p0430

SSGT's99vette on 02-04-2011

02-08-2011 08:10 AM
by SSGT's99vette

6

2,222

0430, 1996, 2005, c6, car, catalyst, cats, clog, code, corvette, forced, induction, p0420, p0430, po420

Have O2 codes P0420 & P0430 need help!!

1badzo6 on 07-13-2010

12-14-2010 09:58 PM
by Joe_G

9

3,533

P0420 code

papafrancisco on 12-07-2010

12-07-2010 07:44 PM
by papafrancisco

0

616

C4 General Discussion

blinking, c5, cel, code, control, corvette, flashing, lamp, mil, p0101, p0131, p0300, p0420, po300, traction

P0300 code and flashing CEL

Aerovette on 10-04-2010

10-04-2010 03:23 PM
by dougbfresh

4

3,244

C6 Corvette General Discussion

biddaddiesgarage, bigdaddiesgarage, cat, catless, cel, corvette, dirty, fix, mini, o2, p0420, p2096, reviews, riding, sensor, work

Riding dirty with the CEL

jsims002 on 09-20-2010

09-20-2010 11:50 AM
by jsims002

3

928

0430, 2004, 2008, c5, c6, code, corvette, efficiency, engine, forum, p0420, p0430, p0430catalyst, system, z06

P0430 Catalyst System Low Efficiency Bank 2 Code Back

Vette Nut on 08-04-2010

08-12-2010 01:12 PM
by h8bumps

9

11,090

2007, c5, c6, c6z06, calibration, catalist, code, codes, corvette, dtc, p0420, p0430, po420, z06, zo6

[Z06]

P0420 Code

SziTech on 06-23-2010

06-25-2010 07:18 PM
by old.hot.rodder

8

8,646

2000, 2008, actron, c5, c6, check, chevy, code, corvette, engine, issues, light, obd2, p0420, po430

[Z06]

My Check Engine Light is on - Code P0420

C6DuffMan on 06-18-2010

06-18-2010 06:57 PM
by 90sundevil

6

4,949

10, catalyst, control, dtcfrzf, efficiency, frame, freeze, j1850, mod, mod10, module, p0420, pwm, sae, threshold

P0420 & Freeze Frame

sbontrag@hotmail.com on 05-13-2010

05-24-2010 02:42 PM
by sbontrag@hotmail.com

10

2,746

P0303

Fujikura on 04-13-2010

04-20-2010 07:33 PM
by Y2Kvert4me

14

2,812

10, c5, code, corvette, hc, p0420, pcm, rdcm, u1064h

[Z06]

Code Help Needed

slong on 03-27-2010

03-28-2010 01:17 PM
by slvrzo6

4

629

back, c6, cats, code, corvette, lazenby, mike, nederland, p0420, p0430, performance, tech2, texas, tko, z06

Code po420

MIKE LAZENBY on 02-27-2010

02-27-2010 10:05 PM
by martysauto

4

1,921

C6 Scan & Tune

1996, 84, c3, c5, check, code, corvette, cyclinder, cylinder, engine, light, misfire, order, p0420, z06

[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

1999, 99, c5, cags, check, code, codes, corvette, engine, mountain, p0420, po420, po430, reprogram, 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

0c, c6, code, corvette, e10, error, gasoline, id, mod10, nmsc, p0171, p0174, p0420, test, yahoo

MIL On Assistance, ID 60 Fail

sbontrag@hotmail.com on 11-24-2009

11-26-2009 12:11 PM
by sbontrag@hotmail.com

2

2,055

96, bank, c5, camaro, codecataletic, converter, corvette, efficency, low, misfire, o2, oxygen, p0420, replace, sensors

P0420 Low Efficiency Bank 1

dogfish246 on 11-23-2009

11-26-2009 06:57 AM
by corvette95

9

2,849

catalyst, catalytic, converter, htd, na, p0420

P0420-Catalytic Converter-HELP Please

sbontrag@hotmail.com on 10-27-2009

11-08-2009 05:40 PM
by sbontrag@hotmail.com

10

959

07, 2008, c6, car, code, eliminator, eliminators, emission, emmsions, evaporation, ga, mil, mustang, p0420, p0430, pass, reporting, test, wont

Must pass emissions! Please help!

nitrod86gt on 09-21-2009

10-09-2009 09:07 AM
by Ron@Vengeance Racing

17

8,678

C6 Scan & Tune

2000, 2004, 2006, 84, bank, c5, catalyst, check, corvette, efficiency, engine, light, p0420, service, threshold

Check engine light on???

FRED HAMBLE on 09-02-2009

09-03-2009 07:50 PM
by FRED HAMBLE

2

838

15, 1995, camaro, catalytic, converter, grand, harness, obd, p0420, pcm, pontiac, reading, wire

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

200, c5, code, communications, corvette, fix, loss, p0420, p0430, po1571, tcs, u1016, u1040, u1064, u1096, volk

c5 went crazy

gorghamak on 05-31-2009

06-07-2009 07:26 AM
by gorghamak

12

1,332

2004, c5, c6, catalytic, code, corsa, corvette, defective, p0420, tsb, z06, zo6

[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

1, 1a, 96, bank, c5, code, codes, corvette, efficeny, efficiency, low, p0420, system, twc, wtc

P0420 TWC System Low Efficiency Bank 1

AQWIKZ on 03-14-2009

03-14-2009 11:16 AM
by AQWIKZ

2

4,122

02, c5, corvette, harness, headers, kook, kooks, o2, offroad, p0420, pipe, problem, problems, sensor, sensors

kooks long tubes O2 sensors

Bad97ta on 01-10-2008

09-23-2008 10:49 AM
by mikelam

4

2,235

02, bypass, c5, causing, corvette, headers, long, p0420, problems, sensor, tube

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

3,601

accelerating, eliminating, p0420, p0430, pipes, road, speedometer, video

I am absolutely stumped

(

1 2 3)

99FRC Newb on 04-24-2008

04-30-2008 10:58 AM
by 99FRC Newb

59

4,174

code, codes, disable, hp, hptuners, mask, p0420, p0430, permanently, po420, tuners, turn, vette

Disable P0420 and P0430?

clif on 04-03-2008

04-03-2008 10:31 AM
by FRCTony

2

2,934

c5, cats, corvette, header, install, p0420, p0430, po430, warranty

some help with p0420 and p0430 please

bill mcdonald on 02-04-2008

03-04-2008 08:04 PM
by flynbya2

15

1,979

c5, code, codep0420, codes, corvette, fault, p0420, p10420, pcm

PCM...Code P0420

6SPD98 on 03-01-2008

03-01-2008 10:27 PM
by 6SPD98

6

1,757

P0420 P0430 Error

BaileyD on 11-19-2007

11-19-2007 05:37 PM
by Humanoid 2.0

7

829

2003, 2004, c5, corvette, cost, p0420, p0430, remove, tune

P0420 & P0430-need help

bdiddo on 10-23-2007

10-26-2007 01:43 AM
by bdiddo

9

1,213

c5, check, code, corvette, dic, engine, light, ls1, p0420, po420, po430

Check Engine Light -- DIC Code P0420

2K4Vert on 10-04-2007

10-05-2007 10:16 AM
by 2K4Vert

3

966

[Z06]

code..P0420

captej on 09-16-2007

09-16-2007 04:17 PM
by captej

4

727

0420, 1999, c5, car, code, corvette, hurt, p0420, pcm, pcm0420

help with engine code PCM 0420

goatjacket on 08-26-2007

08-26-2007 09:34 PM
by Y2Kvert4me

4

868

08, 2006, 420, c6, code, corvette, header, headers, install, p0420, p0430, po420, race, ripp, z06

Headers P0420 Code

toro1966 on 07-28-2007

07-29-2007 07:02 PM
by don.donc

16

4,289

0430, c5, code, corvette, cross, dtc, error, hc, ls1, p0154, p0155, p0420, p0430, trouble, z06

code p0430 ?

royski on 06-14-2007

06-15-2007 12:24 AM
by royski

4

3,646

auto, bank, c5, code, corvette, dtc, efficiency, headers, kooks, low, lt, means, p0420, system, twc

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

5,909

c, c5, chevrolet, clear, code, codes, corvette, dtc, erase, p0420, wont

DTC codes wont clear?

dfwblk2003Z06 on 05-30-2007

05-30-2007 08:13 AM
by runamuk

1

1,289

[Z06]

P0420 Code question....

skeeterJD on 03-27-2007

03-28-2007 04:32 AM
by BlackZ06

1

460

bank, c5, corvette, efficiency, low, p0420, po420, system, twc

P0420-TWC System Low Efficiency Bank 1 questions...

skeeterJD on 03-27-2007

03-27-2007 05:46 PM
by skeeterJD

4

764

0430, 2007, c5, charger, code, dtc, intermittent, p0133, p0420, p0430, p1133, pcm, z06

Pcm Code P0430c

atsugidad on 02-26-2007

03-22-2007 08:48 PM
by cbrf4i1

7

1,974

07, 2004, c5, c6, cat, code, corvette, ctsv, delete, o2, p0420, rear, sensors, sims, tuning, z06

[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

1,230

bad, c5, cats, code, corvette, p0420, signs

P0420 Code - Bad Cat

billjax on 09-23-2006

09-23-2006 02:14 PM
by billjax

0

405

2002, code, codes, corvette, dic, o2s, p0420, p0420corvette, po420, rear, shut, tuner, turn

DIC Code P0420

PVHolgado on 07-26-2006

07-28-2006 10:26 AM
by Billdog350

4

833

0420, 3030, c5, c6, clear, code, corsa, corvette, cot, erase, innova, p0420, p0420p0430, po420, ways

How To Clear Code? P0420?

(

1 2)

BIGGGIE on 07-06-2006

07-10-2006 09:15 PM
by BIGGGIE

21

4,623

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

0420, 2006, bank, c4, c5, chevy, code, codes, corvette, engine, ls1, p0420, p0430, po420, reset, z06

Code Help - P0420, P0430

sgrubbs on 03-08-2006

03-08-2006 01:12 PM
by rudolph schenker

6

1,586

0420, 2002, c, c5, chevrolet, code, codes, corvette, dtc, hc, ls1, p0420, p0440, po420, po440, z06

P0420 H C Code

billjax on 02-04-2006

02-06-2006 07:32 PM
by dpd

7

3,214

2004, air, code, corvette, error, p0420, secondary, shut, valve

Code p0410 and engine running rich...

ex-bmw-man on 01-17-2006

01-30-2006 11:45 AM
by dpd

15

1,134

code p0420 h c

my1stvette.33 on 09-07-2005

10-02-2005 12:44 PM
by boosted_z06

4

705

bank, codes, corvette, efficiency, engine, ho2s, inefficiency, low, p0128, p0131, p0420, sensor, sys, system, twc

Code Help--P0420 TWC System Low Efficiency Bank 1-A

CCONKLIN1 on 09-03-2005

10-01-2005 08:14 PM
by Greenbeast

9

6,844

1a, bank, code, corvette, diagnostic, efficiency, low, p0420, system, twc

TWC System Low Efficiency Bank 1 code

2003silvercorvette on 07-13-2005

07-13-2005 05:40 PM
by torchredfrc

3

1,227

0420, c5, code, corvette, error, headers, light, longtube, ls1, mil, oxygen, p0420, pcm, po420, reported, senor, slp

Code P0420 need opinions

FrankTank on 05-04-2005

05-10-2005 11:02 PM
by dvettetech

8

1,777

40-BCM and 10-PCM showing codes...

StuzVette on 01-11-2005

01-13-2005 10:18 AM
by StuzVette

6

4,840

SES code P0420 (suggestions on replacement cats)

jcook00 on 10-27-2004

10-27-2004 06:18 PM
by SunCr

9

424

0420, 0430, c6, code, corvette, engine, headers, p0420, po420

Headers and P0420

(

1 2)

Dirty Howie on 09-18-2004

09-20-2004 11:55 PM
by SLO VETTE

20

1,537

DTC P0420

Horseshoe Dozer on 05-18-2004

05-18-2004 11:56 AM
by Horseshoe Dozer

2

513

DTC CODE P0420 (KOOKS HEADERS & HI-FLOW CATS )

DNAST1 on 05-09-2004

05-09-2004 01:19 PM
by TT_Vert

1

1,510

What's code P0420 Low Efficiency Bank mean?

KKu77 on 02-18-2004

02-19-2004 10:57 PM
by KKu77

4

3,041

10pcm, c5, camaro, changing, code, codes, corvette, engine, malfunction, octane, p0420, p0430, pcm, po420, remedy

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

c, c5, chevrolet, code, corvette, custom, dtc, ls1, p0420, po420, tune

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

655