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

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Code P0420

Hawk108 on 05-02-2006

05-02-2006 06:28 PM
by 2K2WS6TA

5

529

General Maintenance & Repairs

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

Trouble code P0420?

GerminaTOr on 04-27-2006

04-28-2006 01:31 PM
by GerminaTOr

10

1,428

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 04-14-2006

04-15-2006 04:31 AM
by Raise

10

5,800

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 03-16-2006

03-25-2006 08:35 PM
by WildS6

10

1,153

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 03-08-2006

03-18-2006 02:22 PM
by 2001NBMZ28

4

967

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 02-19-2006

02-23-2006 11:30 AM
by horist

12

5,605

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 12-05-2005

12-20-2005 11:50 AM
by napoleon

16

13,561

PCM Diagnostics & Tuning

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

00' Trans Am Code problems

jmm27 on 03-23-2005

11-10-2005 01:21 AM
by Sick14SecV6

3

840

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 10-09-2005

10-11-2005 09:24 PM
by Y2KblkTA

3

1,617

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 09-22-2005

09-22-2005 10:22 AM
by tomd_2000formula

0

624

PCM Diagnostics & Tuning

HELP!!!P0420 code

SeVeReDiStOrTiOn on 08-29-2005

08-30-2005 10:12 PM
by Y2KblkTA

3

568

PCM Diagnostics & Tuning

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

823

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 06-13-2005

06-20-2005 11:24 PM
by Slammed99s10

7

8,433

Generation III Internal Engine

Poll

POLL: New Cats and need help deciding

ActionJack on 06-03-2005

06-07-2005 07:00 PM
by ActionJack

12

680

Generation III External Engine

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

help p0420 code

twort on 04-04-2005

04-05-2005 10:34 AM
by ICEBOX

2

872

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 03-12-2005

03-21-2005 03:48 PM
by KissMySSo1

6

934

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 12-30-2004

01-02-2005 04:28 PM
by Brett H

7

7,958

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 10-08-2004

10-08-2004 08:45 PM
by jrp

1

1,475

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 06-20-2004

06-23-2004 09:14 PM
by redz00

2

1,339

PCM Diagnostics & Tuning

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

Camaro SS 2002 on 05-22-2004

05-24-2004 08:52 AM
by NOZR1

9

756

Generation III External Engine

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

Dtc P0420

Dozer on 05-18-2004

05-18-2004 10:19 AM
by Dozer

2

912

PCM Diagnostics & Tuning

catalytic, code, converters, dynatech, p0420, powercat

Dtc P0420

smithj on 04-20-2004

04-20-2004 09:43 AM
by smithj

0

440

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 02-17-2004

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

3

950

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 09-16-2003

09-16-2003 12:46 PM
by m1key99WS6

1

784

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 05-09-2003

06-03-2003 01:07 PM
by CarMan

12

2,852

PCM Diagnostics & Tuning

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

P0430 Code

Z28-2000Chuck on 06-01-2003

06-02-2003 08:19 AM
by Predator

4

774

PCM Diagnostics & Tuning

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

surging at idle

ngozer on 04-20-2003

04-21-2003 10:58 AM
by CMNTMXR57

1

720

PCM Diagnostics & Tuning

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

DTC P0420? malfunction in cat?

sal346 on 04-04-2003

04-08-2003 10:21 AM
by CMNTMXR57

10

780

PCM Diagnostics & Tuning

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

DTC P0420? malfunction in cat?

sal346 on 04-04-2003

04-05-2003 12:05 AM
by jaywoo

2

1,446

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 11-06-2002

11-11-2002 08:12 PM
by y2ktranny

2

897

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 11-08-2002

11-10-2002 09:12 PM
by chuckster

5

798

PCM Diagnostics & Tuning

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

P0420 w/O2 Sims???

JoelSS on 10-15-2002

10-18-2002 11:06 PM
by NoGo

5

554

PCM Diagnostics & Tuning

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

FASTR A4 on 09-10-2002

09-11-2002 12:33 AM
by FASTR A4

3

640

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 04-20-2002

04-22-2002 12:24 AM
by dissonance

3

3,894

PCM Diagnostics & Tuning