p0420 - LS1TECH - Camaro and Firebird Forum Discussion - Threads Tagged with p0420

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Code P0420

Hawk108 on May 2, 2006

May 2, 2006 06:28 PM
by 2K2WS6TA

5

583

General Maintenance & Repairs

2000, carolina, cel, charge, check, code, engine, gto, header, headers, installed, list, ls1, p0420, south, stype

Trouble code P0420?

GerminaTOr on Apr 27, 2006

Apr 28, 2006 01:31 PM
by GerminaTOr

10

1,577

Generation III External Engine

02, 0420, affect, bad, cat, effect, effext, engine, gas, make, milage, mileage, p0420, performance, z28

will a bad cat affect gas mileage??

Raise on Apr 14, 2006

Apr 15, 2006 04:31 AM
by Raise

10

5,949

Generation III External Engine

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

1,249

PCM Diagnostics & Tuning

0441, 2001, 97, camaro, chevy, code, efficiency, evap, firebird, low, p0420, p0441, ss, system, twc, v6

P0441 & P0420 Please Help!

Excalibur on Mar 8, 2006

Mar 18, 2006 02:22 PM
by 2001NBMZ28

4

1,024

PCM Diagnostics & Tuning

2004, 420, 430, coupe, dtc, fix, fixed, gm, gtp, infiniti, p0135, p0420, p0430, po, silverado

P0420 just won't go away!

fnbrowning on Feb 19, 2006

Feb 23, 2006 11:30 AM
by horist

12

5,892

PCM Diagnostics & Tuning

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

13,836

PCM Diagnostics & Tuning

00, 2000, 2001, code, codes, corvette, innova, p0151, p0420, p0430, p1153, trans, transam

00' Trans Am Code problems

jmm27 on Mar 23, 2005

Nov 10, 2005 01:21 AM
by Sick14SecV6

3

913

PCM Diagnostics & Tuning

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

1,706

PCM Diagnostics & Tuning

codes, hemi, p0137, p0157, p0171, p0174, p0420, p0430, po137, po157, po171, po174

getting several codes - need some help running down fixes

tomd_2000formula on Sep 22, 2005

Sep 22, 2005 10:22 AM
by tomd_2000formula

0

665

PCM Diagnostics & Tuning

HELP!!!P0420 code

SeVeReDiStOrTiOn on Aug 29, 2005

Aug 30, 2005 10:12 PM
by Y2KblkTA

3

594

PCM Diagnostics & Tuning

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

887

PCM Diagnostics & Tuning

2006, code, g6, gauge, gen, idle, idling, ls1, p0300, p0420, rough, ruff, seafoam, ss, temp, thinner

Rough idle & infamous P0420 code (long)

Slammed99s10 on Jun 13, 2005

Jun 20, 2005 11:24 PM
by Slammed99s10

7

8,704

Generation III Internal Engine

Poll

POLL: New Cats and need help deciding

ActionJack on Jun 3, 2005

Jun 7, 2005 07:00 PM
by ActionJack

12

733

Generation III External Engine

clearing, code, conditions, dtc, emission, emissions, ls1tech, p0410, p0420, po325, setting, test, trans

help p0420 code

twort on Apr 4, 2005

Apr 5, 2005 10:34 AM
by ICEBOX

2

952

PCM Diagnostics & Tuning

2011, camaro, chevrolet, code, fuel, injector, l99, lookup, ls3, p0420, p1133, p1153, pcode, pontiac, ws6

p1133 ? and p1153 ? What?

Texas_WS6 on Mar 12, 2005

Mar 21, 2005 03:48 PM
by KissMySSo1

6

1,073

PCM Diagnostics & Tuning

2004, 96, chevy, chrysler, cobra, code, codes, hemi, lt1, p0420, p0430, ss, tahoe, trailblazer, trans, troubleshooting, z28

Have a service engine light code "P0430" help!!

MetallicBluews6 on Dec 30, 2004

Jan 2, 2005 04:28 PM
by Brett H

7

8,425

PCM Diagnostics & Tuning

2000, 97, bad, catalyic, catalytic, clogged, code, converter, convertors, p0420, replace, replaced, replacing, run, yukon

Need help with catalytic converter on GMC Yukon

field_williams on Oct 8, 2004

Oct 8, 2004 08:45 PM
by jrp

1

1,533

Generation III External Engine

0420, code, codes, detonation, ethanol, fuel, gas, o2, ol, p0420, p0420p0430, p0430, p420, petrol, reading

P0420/P0430 Codes...Fuel issue?

nthnwbr on Jun 20, 2004

Jun 23, 2004 09:14 PM
by redz00

2

1,460

PCM Diagnostics & Tuning

DId you get an SES light with a CATTED Y pipe???

Camaro SS 2002 on May 22, 2004

May 24, 2004 08:52 AM
by NOZR1

9

824

Generation III External Engine

bank, codes, corvette, diablo, dic, dtc, dtcs, efficiency, hp, low, ls1, ndozer, p0420, system, tuners, twc

Dtc P0420

Dozer on May 18, 2004

May 18, 2004 10:19 AM
by Dozer

2

1,036

PCM Diagnostics & Tuning

catalytic, code, converters, dynatech, p0420, powercat

Dtc P0420

smithj on Apr 20, 2004

Apr 20, 2004 09:43 AM
by smithj

0

472

PCM Diagnostics & Tuning

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

1,030

PCM Diagnostics & Tuning

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

837

PCM Diagnostics & Tuning

09a, 2002, a, ac, control, corvette, electrical, intermittent, kooks, light, p0420, p0430, p0748, pressure, set, solenoid, trans, turned

Intermittent P0420, P0430 and P0748

CarMan on May 9, 2003

Jun 3, 2003 01:07 PM
by CarMan

12

2,917

PCM Diagnostics & Tuning

0430, 2000, 2003, 99, c5, code, engine, p0420, p0430, p430, pcm, pontiac, tbss, trans, z28

P0430 Code

Z28-2000Chuck on Jun 1, 2003

Jun 2, 2003 08:19 AM
by Predator

4

890

PCM Diagnostics & Tuning

car, dtc, idle, p0420, stall, surge, surges

surging at idle

ngozer on Apr 20, 2003

Apr 21, 2003 10:58 AM
by CMNTMXR57

1

809

PCM Diagnostics & Tuning

bypass, calibrate, camaro, catalyst, catylatic, convertor, dtc, gut, ls2, malfunction, p0420, pcm, trans

DTC P0420? malfunction in cat?

sal346 on Apr 4, 2003

Apr 8, 2003 10:21 AM
by CMNTMXR57

10

879

PCM Diagnostics & Tuning

2006, dtc, p0410, p0420, pontiac, suzuki, trans

DTC P0420? malfunction in cat?

sal346 on Apr 4, 2003

Apr 5, 2003 12:05 AM
by jaywoo

2

1,555

PCM Diagnostics & Tuning

02, 0420, bad, cat, low, ls1tech, o2, oxygen, p0420, pcm, po420, sensor, sensors, set, symptoms, system, twc, vat

P0420 - is it the cat or O2 sensor gone bad?

Blistering Z on Nov 6, 2002

Nov 11, 2002 08:12 PM
by y2ktranny

2

988

PCM Diagnostics & Tuning

cat, codes, delete, disable, edit, ls1, ls1edit, o2, p0137, p0138, p0140, p0420, p0430, rear, turn

How to turn off rear O2s with LS1edit?

1slowCamaro on Nov 8, 2002

Nov 10, 2002 09:12 PM
by chuckster

5

918

PCM Diagnostics & Tuning

01, 1500, 2002, camaro, location, mpg, o2, p0420, p1133, sensor, silverado, sim, sims, ss, trailblazer

P0420 w/O2 Sims???

JoelSS on Oct 15, 2002

Oct 18, 2002 11:06 PM
by NoGo

5

652

PCM Diagnostics & Tuning

P0420 - Is Bank 1 the driver's side O2?

FASTR A4 on Sep 10, 2002

Sep 11, 2002 12:33 AM
by FASTR A4

3

703

PCM Diagnostics & Tuning

4l60e, bank, catalyst, code, dtc, efficency, efficiency, gm, low, p00420, p0420, p0420b, po420, system, twc

What is P0420 TWC System Low Efficiency?

Dom on Apr 20, 2002

Apr 22, 2002 12:24 AM
by dissonance

3

4,070

PCM Diagnostics & Tuning