Threads Tagged with po420

2013, camaro, exhaust, po420, po430, solo, ss

Can anyone please help

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1 2)

hardasskerry on 03-09-2013

03-17-2013 01:59 AM
by RPM WS6

20

1,456

10, car, cat, caused, causing, clogged, code, cylinder, hemi, misfire, mod, p0300, p0420, plugged, po420, s10

p0300 and p0420.."clogged" cat..random misfire?

arock24 on 01-30-2012

11-30-2012 02:03 PM
by arock24

6

17,828

00, 430, afer, cadillace, code, eliminate, engine, fixes, ls400, o2, pcm, po, po420, po430, silverado

Got the engine codes PO420 and PO430.

Ricmiester on 09-03-2012

09-04-2012 02:47 PM
by FiredUpZ28

7

3,241

130000, 140, 1997, am, bad, camaro, code, geo, metro, miles, obd2, po420, trans, ws6, z28

Obd2 code problem

A Seven X on 04-16-2012

04-17-2012 06:22 PM
by mannyman84

6

854

Western Members

2000, 2002, camaro, exhaust, generic, gm, mil, p0420, po420, pontiac, soot, ta, trans, v8, z28

P0420 DTC, MIL On, have a generic ?

GormanRacingZ28 on 01-07-2012

01-08-2012 01:55 PM
by RPM WS6

4

1,224

02, 430, cat, cats, code, delete, flowing, ls1, ls1tech, o2, po420, rear, simms, sims, venders

O2 sims or cats

Vassago on 01-06-2012

01-06-2012 09:08 PM
by Vassago

2

817

02, 0420, 2002, 420, 99, bad, camaro, camero, cat, chevrolet, code, ls1, oem, p0420, po, po420, z28

02' Z28 Camaro P0420 Cat Efficiency!!!!

GormanRacingZ28 on 12-17-2011

12-18-2011 10:03 AM
by 99canadahawk

5

7,664

Po420-po430

00redta88 on 11-07-2011

11-10-2011 09:54 PM
by 00redta88

9

6,411

2001, 2002, andp0420, camaro, code, fixed, inspection, nc, p0171, p0420, pass, po420, pontiac, state, trans

Trying to Pass Inspection-P0171 and P0420

Harmon on 09-24-2011

10-01-2011 04:25 PM
by Harmon

7

2,214

0420, 2001, 2002, 38, 99, camaro, chevy, code, exhaust, ls1tech, missing, p0420, p420, po420, rattles, v6

P0420, changed cat & rear 02, CEL still come on

Fotis on 07-29-2011

08-04-2011 12:21 AM
by SuperSpeed27

10

5,133

2000, 2001, bank, camero, catalyst, gm, left, monitor, po420, po420code, set, system, threshold, wont, z28

Bone Stock '00 SS PO420 code?

TransAmWS.6 on 05-06-2011

05-07-2011 09:41 PM
by TransAmWS.6

7

1,596

01, 96, bank, code, codes, delete, filter, firebird, kn, ls1, p0420, po410, po420, pontiac, trouble

PO410 and PO420 help

Prediluted on 03-29-2011

03-29-2011 01:58 PM
by Prediluted

0

1,130

Cadillac CTS-V 2004-2007 (Gen I)

P0420

Scott96LT1 on 03-22-2011

03-23-2011 04:26 PM
by Scott96LT1

4

2,272

help!! must read asap!!

blackwidowSS on 01-28-2011

01-28-2011 10:26 AM
by blackwidowSS

6

532

04, 2500hd, air, flow, ford, gmc, ls1tech, maf, mass, misfire, p0101, p0300, p0420, po101, po300, po420, sierra

P0300, P0101, P0420 Please Help

Tim94gt on 12-15-2010

12-16-2010 04:47 PM
by Tim94gt

1

4,452

02, 2002, catalytic, check, engine, issues, light, po420, problem, problems, ses, stock, z28

new 2002 Z28 owner, with problems already!

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1 2)

staledog on 11-13-2010

11-18-2010 11:49 PM
by The Bronx Bull

25

2,755

2000, 2002, catalytic, chevrolet, converter, converters, corvette, extended, firebird, ls1, p0420, po420, pontiac, trans, waranty, warranty

P0420 - CAT - Warranty ?

dancrosoft on 06-08-2009

10-25-2010 07:31 PM
by NBM-LS1

5

1,801

12, 2000, bank, camaro, codes, lean, mix, p0171, p0174, p0420, po171, po174, po420, pontiac, ss

p0174 p0171 bank 1 & 2 lean p0420 cat threshold

AldenSS on 09-28-2010

09-28-2010 06:05 PM
by AldenSS

0

3,091

code, edit, engine, grand, gxp, hp, ls1, ls4, plug, po420, prix, tune, tuner, tunning, wires

hp tuners, 06 LS4

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1 2)

bill06ss on 05-17-2010

07-17-2010 11:09 AM
by Brian396

30

12,932

LS4 Performance

1999, aftermarket, cat, catalyst, catlayst, cod, code, eliminating, exhaust, insufficient, long, ls1, ls1tech, p0420, po420, tubes

Code P0420 Help!

98blueSS420 on 05-06-2010

05-08-2010 01:08 PM
by 98blueSS420

4

1,066

code, firebird, ls1, ls1tech, po420, sim

SES light - PO420 Code

Cheetoh on 03-27-2010

03-28-2010 07:20 PM
by Cheetoh

3

826

BlancoSS on 03-21-2010

03-24-2010 10:09 PM
by BlancoSS

11

1,174

am, cat, cats, code, codes, dtc, eff, gm, normal, oil, onemeanls1z28, p0420, po420, pressure, trans

Car throwing P0420 code and oil pressure above normal

SonicBoom on 03-02-2010

03-06-2010 06:32 PM
by 06tx4.8

7

3,415

Texas Members

03, 05513, 38, 420, chevy, code, driving, firebird, gm, impala, multiple, p0420, po420, policy, special

PO 420 help

beyonddisturbed on 02-24-2010

02-26-2010 09:24 PM
by joshp14

7

957

03, cat, cataclean, cats, chevron, cleaner, fuel, injector, l200, ls1tech, p0420, po420, replacement, saturn, shocking, techron

DTC P0420 -Shocking the cat?

koolaid_kid on 09-13-2009

09-13-2009 12:47 PM
by koolaid_kid

4

3,879

02, 2000, 2002, 38, autotap, cadillac, camaro, code, ls1, ls1tech, p0420, po420, pontiac, simms, tech

Code P0420 Keeps coming up...what is this?

2000 ws6 on 01-28-2002

09-04-2009 05:56 PM
by vasile2

16

17,675

1, 2001, 2002, 88, catalyst, efficiency, firebird, ls, olds, p0420, po420, pontiac, system, thresholdbank, v6, z28

P0420 code need help

Steve8S on 07-08-2009

07-09-2009 09:04 AM
by dancrosoft

8

8,651

1998, 2000, 2001, bank, camaro, catalytic, code, defective, firebird, ls1, p0420, po420, pontiac, trans, transam

Code p0420

Ice78Transam on 03-30-2009

03-31-2009 12:51 AM
by Zerokube

5

1,153

1997, camaro, catalytic, converter, direct, fit, ls1, ls1tech, lt1, magnaflow, obd2, p0420, p0430, po420, scanner, ses, spun

SES Light - cat needs to be replaced?

Lime on 09-18-2008

10-02-2008 04:34 PM
by Formula413

14

1,113

2001, 430, camaro, chevy, codes, ls1tech, o2, po, po420, po420po430, po430, replaced, sensor, simulator, z28

? About PO420,PO430

RobZ on 06-11-2008

06-11-2008 08:45 PM
by RobZ

3

891

Texas Members

2000, 38, 38l, catalytic, code, conditions, converter, damage, firbird, firebird, intermittent, p0420, physical, po420, ses, setting

Ses P0420

zanethan on 06-07-2008

06-08-2008 03:24 AM
by atxz/28maro

1

991

1997, 1999, car, code, eclipse, firebird, lt1, modified, p0420, p0441, po420, po441, pontiac, stand, z28

P0420, P0441, P0420

Cheap Guy on 06-07-2008

06-07-2008 12:18 PM
by Cheap Guy

0

1,570

LT1-LT4 Modifications

97, code, corvette, deleted, efilive, emissions, light, p0140, p0420, p0430, pass, pcm, po420, shut, tune, turns, ws6

P0420.. But I deleted my 02' soncers.. Mistake?

01ls1lover on 04-12-2008

04-21-2008 04:48 PM
by 01ls1lover

14

1,421

2000, 2002, 2003, 2004, 2005, 2007, 420, 60, bank, code, escalade, impala, p0420, po, po420

Code p0420

WS SIKZ on 03-25-2007

01-08-2008 12:48 PM
by 7901 WS6

12

2,852

2006, 420, carlo, code, eliminator, grand, grandprix, gxp, ls1tech, mil, monte, o2, po420, prix, ss

PO420 eliminator

supercatxr7 on 11-24-2007

11-24-2007 05:55 PM
by supercatxr7

0

764

LS4 Performance

1996, 2006, carlo, chevrolet, chevy, code, downpipe, hogan, impala, monte, p0400, p0420, p0430, po420, ss

Hogan down pipe

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1 2 3)

Mels SS on 10-14-2007

11-01-2007 11:55 AM
by deft

43

4,220

LS4 Performance

No cats - need help

JasonVT on 07-26-2007

07-28-2007 07:38 AM
by JasonVT

16

568

2004, 2006, bad, cat, code, diagnostic, gto, ls1tech, p0420, po420, s60, tree, ws6

P0420 Just threw that code, bad cat?

CapoWS6 on 08-07-2006

08-18-2006 07:49 PM
by SSblack98

14

1,734

2000, camro, codes, engine, fx4, headers, install, installing, light, ls1tech, o2, po420, po430, rid, service, ses, sims, ss

ses light after installing headers and o2 sims

white ta on 06-05-2006

06-06-2006 01:11 AM
by Justin00SS

6

594

02, 1500, 1999, 2004, 53, 99, camaro, code, p0420, po420, pontiac, silverado, trans, transam, vortec

Code P0420 anyone have any information?

BigBenz on 03-16-2006

03-25-2006 08:35 PM
by WildS6

10

1,132

2001, camaro, chevy, code, gm, loss, ls1, ls1tech, performance, po420, trouble, troublecodepo420

Help! Trouble Code PO420?

ponchoWS6 on 02-16-2006

03-05-2006 10:42 PM
by Super Speed

12

915

code, pcm, po400, po403, po420, problems

help: im getting codes po400, po403, po420

SICKBIRD on 01-11-2006

01-11-2006 03:57 PM
by AdamSS

1

578

2000, bypassing, camaro, catalyst, catalytic, code, converter, efficiency, gm, p0420, po420, system, threshold, trans, warenty

P0420 Catalyst System Efficiency Below Threshold (Bank 1)

SPL on 12-05-2005

12-20-2005 11:50 AM
by napoleon

16

13,448

2002, catalyst, cats, chevrolet, cod, code, codes, corvette, e38, flow, high, inefficency, p0420, po420, sensor

P0420 Catalyst code and the Best fix.

fnbrowning on 10-09-2005

10-11-2005 09:24 PM
by Y2KblkTA

3

1,601

2005, cat, code, corvette, efi, flow, high, install, live, p0420, p0430, po420, sporadic, trans, z06

P0420 code

JPWS6 on 07-24-2005

07-25-2005 09:04 PM
by 405HP_Z06

5

808

My Car Keeps Setting Code PO420!

Bird_Of_Prey on 03-16-2004

03-17-2004 12:24 PM
by Bird_Of_Prey

6

668

2002, bank, catalyst, code, efficeny, extenders, fuel, ls1tech, o2, p0420, p420, pass, po420, regular, smog, system, threshold, trans

Need help with code P0420

BillSS on 02-17-2004

02-17-2004 10:30 PM
by blk~2000~Z28

3

940

PO420 Catalyst Low

WayneSS01 on 02-12-2004

02-12-2004 12:25 PM
by samz28

1

490

0420, 2002, catalyst, chrysler, code, coe, hp, ls1, p0420, po420, sebring, ses, tech, tuners, z28

HELP THREW SES CODE P0420 CATALYST SYSTEM

ChazLS12002 on 09-16-2003

09-16-2003 12:46 PM
by m1key99WS6

1

775