Threads Tagged with p0420

2000, california, camaro, catalytic, code, converter, converters, criteria, law, ls1tech, magnaflow, matter, p0420, p0430, recalls, transam

California Catalytic Converter !?

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1 2)

draklon13 on Jun 13, 2009

Nov 11, 2009 08:17 PM
by ke6eum

29

15,846

cat, code, dtc, gm, p0141, p01415, p0420, ws6

Got new cat and now a new code...need help!!

raljr9 on Oct 13, 2009

Oct 14, 2009 07:19 PM
by 98pontiac

6

790

anti, code, downpipe, dp7s, foulers, gain, grand, gxp, hogan, hp, magnaflow, p0420, performance, plug, prix, silverado, spark

hogan DP

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1 2 3)

johnrogeri12 on Apr 5, 2009

Sep 16, 2009 10:25 PM
by Rossko85

51

4,629

LS4 Performance

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

4,239

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

18,275

Generation III Internal Engine

P0420 again!

PREB_2K2FORMULA on Jul 31, 2009

Aug 3, 2009 01:53 PM
by PREB_2K2FORMULA

2

587

altima, caddy, cadillac, cai, check, code, cts, ctsv, engine, gm, gto, hemi, light, p0420, sensor

P0420 Code help!

amfmlittle on Jul 25, 2009

Jul 27, 2009 09:22 AM
by 1actsv

9

7,635

Cadillac CTS-V 2004-2007 (Gen I)

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

9,167

1133, 2005, 22, code, ecotec, engine, exhaust, fix, grand, gtp, leak, p0420, p1133, p1134, pontiac, prix, silverado

any mechanics in the house?? please can you help me out??

bdyman on Jun 10, 2009

Jun 15, 2009 06:52 PM
by 00ssmg

19

1,205

Midwestern Members

P0200 and P0332 and others.

Justin Gibbons on Jun 4, 2009

Jun 5, 2009 12:50 PM
by Justin Gibbons

1

776

Generation III External Engine

catalytic, converter, extended, p0420, warranty

F*cking Cat is dying! Have a couple questions...

Nightrydass on Apr 24, 2009

Apr 25, 2009 08:45 PM
by massls1guy

13

1,013

body, car, cat, effic, exhaust, faster, makes, p0420, threshold, throttle, upgrade

Throttle body or exhaust? HELP!

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1 2)

camarolover209 on Mar 21, 2009

Apr 2, 2009 04:41 PM
by FirebirdWS86

21

1,432

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

1,227

got my SES codes. need help.

yungepjr on Jan 9, 2009

Jan 9, 2009 07:54 PM
by ROCNDAV

3

653

Western Members

code, codes, delete, deleting, diablo, diablosport, diagnostic, erase, p0420, pcm, predator, sport, tune, tuner, ways

how do you delete p0420 code with diablosport?

srtricky on Dec 20, 2008

Dec 20, 2008 10:39 PM
by srtricky

2

2,265

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

1,179

Repeated instances of P0420

jedimaster71472 on Sep 13, 2008

Sep 21, 2008 09:40 AM
by jedimaster71472

3

934

Service Engine Soon(P0430/P0420)

99Ws6302 on Sep 16, 2008

Sep 16, 2008 11:56 PM
by 99Ws6302

1

610

01, 2005, 2006, 57, camaro, cat, code, fix, grand, gxp, p0420, prix, seafoam, seaform, silverado, unclog

P0420 Stayed Gone Once Cleard. Is It Ok Now?

Bad06SS on Aug 18, 2008

Aug 18, 2008 09:58 PM
by S8ER95Z

5

1,429

General LSX Automobile Discussion

2002, 420, 430, actron, code, cp9145, gm, heater, ho2s, lincoln, ls1tech, p0420, performance, replacing, zr2

code 420: cats, questions and options?

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1 2)

BrianMSmith on Feb 22, 2008

Jul 9, 2008 08:54 PM
by Mean87SS

20

6,034

1, 2000, 2001, 2004, 43, bank, banks, catalyst, efficiency, impala, nissian, p0420, silverado, system, threshold

Catalyst System Efficiency Below Threshold

ZeroFear on Apr 14, 2008

Jun 20, 2008 05:47 PM
by Black01M6SS

17

5,567

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

1,120

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

1,673

Noob Exhaust Question

Ruedy4 on May 28, 2008

May 30, 2008 07:50 PM
by SOMbitch

11

713

2000, camaro, catalytic, check, converter, emissions, engine, extended, light, ls1, p0420, service, test, v8, warranty

Check Engine Light-what's this code mean?

wyattmutigerlaw on May 6, 2008

May 7, 2008 06:58 PM
by Black01M6SS

12

1,971

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

1,567

1997, 97, camaro, continental, coolant, engine, light, lincoln, low, p0420, service, z28

Pulled 4 codes tonight

mcalus on Apr 16, 2008

Apr 18, 2008 02:23 PM
by venom889

7

1,220

P0420 Code ?

RobZ on Apr 7, 2008

Apr 7, 2008 03:21 PM
by edcmat-l1

2

726

General LSX Automobile Discussion

2002, 30, 95, cel, code, p0420, rid, saab, turbo, v6

Hello and some help

saabtols1 on Apr 2, 2008

Apr 2, 2008 08:59 AM
by saabtols1

4

472

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

2,997

0430, 2001, 99, bank, camaro, catalyst, chevy, code, dtc, efficiency, gm, gmc, hemi, p0420, p0430

p0420 and p0430 even after brand new gm cats

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1 2)

promod1955 on Aug 23, 2007

Nov 9, 2007 04:18 PM
by Cruz28

35

54,695

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

4,560

LS4 Performance

capacitor, code, laws, minnesota, odb2, p0420, p0430, sensor, smog, trick

D*mn Cali smog law

rocketz28 on Aug 23, 2007

Aug 24, 2007 01:37 AM
by z28fury

2

796

1, bank, car, catalyst, code, effeciency, efficiency, firebird, gmc, low, p0420, pending, pontiac, stalls, system

Catalyst system low efficiency bank 1

supersickss on Aug 6, 2007

Aug 7, 2007 01:20 PM
by 2001NBMZ28

4

1,294

bank, catalyst, code, jeep, jetta, liberty, lt1, p0125, p0171, p0172, p0400, p0420, p1573, system, threshold, vw

anyone had these codes?

1slot/a408 on Aug 1, 2007

Aug 1, 2007 10:32 PM
by dhdenney

7

974

Bad cat

Dozier13 on Jun 28, 2007

Jul 2, 2007 04:12 PM
by Dozier13

4

686

Generation III External Engine

02, 2002, chevrolet, code, codes, engine, fix, gm, malibu, p0420, po1153, po152, po300, po430, problem, suburban

Both 02 Sensors Bad...

CaMaRo67RS355 on Mar 13, 2007

May 30, 2007 06:11 PM
by 98silverz28

17

2,917

needin help bad

sscamaro96 on Apr 30, 2007

Apr 30, 2007 08:45 PM
by SincalT/A

2

830

code p0420

2000 Tran Zam on Mar 26, 2007

Mar 26, 2007 09:00 PM
by monsterbreather

2

531

0420, 97, bank, camaro, catalyst, efficiency, firebird, ls1tech, lt1, lt4, out, p0420, rule, side, threshold

P0420 Catalyst Below Efficiency... But which?

MusPuppis on Mar 13, 2007

Mar 13, 2007 04:53 PM
by Formula413

1

1,522

2004, code, codes, diagnose, g8, gt, gto, o2, p0420, rear, sensor

Diagnosing rear O2's

Steel Chicken on Nov 28, 2006

Feb 16, 2007 09:13 AM
by b4c2002camaro

11

652

01, 05, 1004, carlo, cat, flow, ho2s, impala, light, monte, mv, p0420, reading, ses, set, silverado, ss

i need some help please

joeilesGXP on Jan 6, 2007

Jan 10, 2007 09:46 PM
by joeilesGXP

9

1,081

LS4 Performance

57, body, bulletin, camaro, catalytic, converter, impala, letter, ls1, p0420, p0430, recall, service, ss, tsb05513, x3

service bulletin letter in the mail

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1 2)

R1LS1 on Dec 8, 2006

Jan 6, 2007 09:35 AM
by AutomagicLS1

24

2,573

Chevrolet Camaro 1967-2002

1153, 2001, 2002, 98, camaro, cats, chevrolet, chevy, code, codep0420, manufactured, p0420, p1153, ss

Code P0420, and P1153 please help.

mgmz28 on Dec 28, 2006

Dec 28, 2006 04:07 PM
by mgmz28

3

1,773

1998, 2001, 99, camaro, chevy, codes, dtc, firebird, formula, gm, legacy, p0420, p0430, subaru, z28

SES Light - P0420 and P0430..NEED HELP!!

ModGod on Aug 29, 2006

Sep 1, 2006 10:02 PM
by ModGod

14

2,243

Generation III External Engine

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

1,832

code, ls1, p0300, p0420, p0420pd, pd, tahoe

After plugs and wires ...............

Fire Inside on Aug 14, 2006

Aug 15, 2006 01:20 AM
by Fire Inside

2

685

442, code, codes, diagnostic, dtc, egr, fix, frustrated, ls1, p0401, p0420, p0530, p1441, pcm, tree

Help Please...12 DTC CODES!!!

DarkAzNite on Aug 8, 2006

Aug 8, 2006 11:11 PM
by DarkAzNite

6

1,170