Threads Tagged with po420

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

Can anyone please help

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1 2)

hardasskerry on Mar 9, 2013

Mar 17, 2013 01:59 AM
by RPM WS6

20

1,718

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 Jan 30, 2012

Nov 30, 2012 02:03 PM
by arock24

6

19,894

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

Got the engine codes PO420 and PO430.

Ricmiester on Sep 3, 2012

Sep 4, 2012 02:47 PM
by FiredUpZ28

7

3,449

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

Obd2 code problem

A Seven X on Apr 16, 2012

Apr 17, 2012 06:22 PM
by mannyman84

6

915

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 Jan 7, 2012

Jan 8, 2012 01:55 PM
by RPM WS6

4

1,331

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

O2 sims or cats

Vassago on Jan 6, 2012

Jan 6, 2012 09:08 PM
by Vassago

2

883

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 Dec 17, 2011

Dec 18, 2011 10:03 AM
by 99canadahawk

5

8,090

Po420-po430

00redta88 on Nov 7, 2011

Nov 10, 2011 09:54 PM
by 00redta88

9

6,526

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

Trying to Pass Inspection-P0171 and P0420

Harmon on Sep 24, 2011

Oct 1, 2011 04:25 PM
by Harmon

7

2,313

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 Jul 29, 2011

Aug 4, 2011 12:21 AM
by SuperSpeed27

10

5,335

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

Bone Stock '00 SS PO420 code?

TransAmWS.6 on May 6, 2011

May 7, 2011 09:41 PM
by TransAmWS.6

7

1,687

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

PO410 and PO420 help

Prediluted on Mar 29, 2011

Mar 29, 2011 01:58 PM
by Prediluted

0

1,197

Cadillac CTS-V 2004-2007 (Gen I)

P0420

Scott96LT1 on Mar 22, 2011

Mar 23, 2011 04:26 PM
by Scott96LT1

4

2,429

help!! must read asap!!

blackwidowSS on Jan 28, 2011

Jan 28, 2011 10:26 AM
by blackwidowSS

6

609

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

P0300, P0101, P0420 Please Help

Tim94gt on Dec 15, 2010

Dec 16, 2010 04:47 PM
by Tim94gt

1

4,769

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 Nov 13, 2010

Nov 18, 2010 11:49 PM
by The Bronx Bull

25

2,889

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

P0420 - CAT - Warranty ?

dancrosoft on Jun 8, 2009

Oct 25, 2010 07:31 PM
by NBM-LS1

5

1,872

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 Sep 28, 2010

Sep 28, 2010 06:05 PM
by AldenSS

0

3,296

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 May 17, 2010

Jul 17, 2010 11:09 AM
by Brian396

30

13,838

LS4 Performance

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

Code P0420 Help!

98blueSS420 on May 6, 2010

May 8, 2010 01:08 PM
by 98blueSS420

4

1,194

code, firebird, ls1, ls1tech, po420, sim

SES light - PO420 Code

Cheetoh on Mar 27, 2010

Mar 28, 2010 07:20 PM
by Cheetoh

3

895

BlancoSS on Mar 21, 2010

Mar 24, 2010 10:09 PM
by BlancoSS

11

1,259

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 Mar 2, 2010

Mar 6, 2010 06:32 PM
by 06tx4.8

7

4,087

Texas Members

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

PO 420 help

beyonddisturbed on Feb 24, 2010

Feb 26, 2010 09:24 PM
by joshp14

7

1,012

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

DTC P0420 -Shocking the cat?

koolaid_kid on Sep 13, 2009

Sep 13, 2009 12:47 PM
by koolaid_kid

4

4,227

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 Jan 28, 2002

Sep 4, 2009 05:56 PM
by vasile2

16

18,245

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

P0420 code need help

Steve8S on Jul 8, 2009

Jul 9, 2009 09:04 AM
by dancrosoft

8

9,158

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

Code p0420

Ice78Transam on Mar 30, 2009

Mar 31, 2009 12:51 AM
by Zerokube

5

1,225

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 Sep 18, 2008

Oct 2, 2008 04:34 PM
by Formula413

14

1,172

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

? About PO420,PO430

RobZ on Jun 11, 2008

Jun 11, 2008 08:45 PM
by RobZ

3

958

Texas Members

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

Ses P0420

zanethan on Jun 7, 2008

Jun 8, 2008 03:24 AM
by atxz/28maro

1

1,115

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

P0420, P0441, P0420

Cheap Guy on Jun 7, 2008

Jun 7, 2008 12:18 PM
by Cheap Guy

0

1,669

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 Apr 12, 2008

Apr 21, 2008 04:48 PM
by 01ls1lover

14

1,558

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

Code p0420

WS SIKZ on Mar 25, 2007

Jan 8, 2008 12:48 PM
by 7901 WS6

12

2,990

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

PO420 eliminator

supercatxr7 on Nov 24, 2007

Nov 24, 2007 05:55 PM
by supercatxr7

0

805

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 Oct 14, 2007

Nov 1, 2007 11:55 AM
by deft

43

4,524

LS4 Performance

No cats - need help

JasonVT on Jul 26, 2007

Jul 28, 2007 07:38 AM
by JasonVT

16

651

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

P0420 Just threw that code, bad cat?

CapoWS6 on Aug 7, 2006

Aug 18, 2006 07:49 PM
by SSblack98

14

1,823

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 Jun 5, 2006

Jun 6, 2006 01:11 AM
by Justin00SS

6

692

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

Code P0420 anyone have any information?

BigBenz on Mar 16, 2006

Mar 25, 2006 08:35 PM
by WildS6

10

1,265

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

Help! Trouble Code PO420?

ponchoWS6 on Feb 16, 2006

Mar 5, 2006 10:42 PM
by Super Speed

12

978

code, pcm, po400, po403, po420, problems

help: im getting codes po400, po403, po420

SICKBIRD on Jan 11, 2006

Jan 11, 2006 03:57 PM
by AdamSS

1

649

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 Dec 5, 2005

Dec 20, 2005 11:50 AM
by napoleon

16

13,857

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

P0420 Catalyst code and the Best fix.

fnbrowning on Oct 9, 2005

Oct 11, 2005 09:24 PM
by Y2KblkTA

3

1,714

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

P0420 code

JPWS6 on Jul 24, 2005

Jul 25, 2005 09:04 PM
by 405HP_Z06

5

892

My Car Keeps Setting Code PO420!

Bird_Of_Prey on Mar 16, 2004

Mar 17, 2004 12:24 PM
by Bird_Of_Prey

6

740

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 Feb 17, 2004

Feb 17, 2004 10:30 PM
by blk~2000~Z28

3

1,040

PO420 Catalyst Low

WayneSS01 on Feb 12, 2004

Feb 12, 2004 12:25 PM
by samz28

1

564

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

HELP THREW SES CODE P0420 CATALYST SYSTEM

ChazLS12002 on Sep 16, 2003

Sep 16, 2003 12:46 PM
by m1key99WS6

1

843