p420 - LS1TECH - Camaro and Firebird Forum Discussion - Threads Tagged with p420

LS1TECH - Camaro and Firebird Forum Discussion
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Threads Tagged with p420

Threads Tagged with p420

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bad, causing, code, coil, ignition, ls1tech, ls7, p0347, p0357, p420, problem, problems, starting, test

Ignition Coil Problem

black2001ws6 on Sep 26, 2009

Apr 14, 2014 11:47 PM
by Ford_Assassin

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9

2,703

Generation III External Engine

check, hood, p420, smog

p420 replaced rear o2 cat looks fine in smog test

Haddixj on Apr 14, 2013

Apr 15, 2013 12:06 PM
by RPM WS6

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4

708

General Maintenance & Repairs

0420, bad, code, diablo, engine, ford, high, idle, idleing, idles, jetta, maf, p0420, p420, stop, tuner

P0420 Sets At idle only

T/A2000 on Nov 16, 2011

Nov 17, 2011 11:04 AM
by T/A2000

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6

6,918

PCM Diagnostics & Tuning

Exclamation

anti, camaro, code, fouler, foulers, ls1, mitsubishi, multiple, o2, p0420, p420, plug, procedure, spark, trick, work

Code P0420, use rear o2 anti foulers?

98blueSS420 on Aug 8, 2011

Aug 12, 2011 10:59 PM
by Zlow28

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7

6,305

Generation III External Engine

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

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10

5,335

General Maintenance & Repairs

03, 07, 2001, 2011, cherokee, code, denali, g8, grand, jeep, ls1tech, p0420, p420, patrick, po0420

P0420/430 Help me Obi Wan Patick G

rlwjr1 on Jun 23, 2011

Jun 23, 2011 04:14 PM
by 2002_Z28_Six_Speed

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2

1,338

Pontiac G8 2008-09 & Chevrolet SS 2014+

420, 430, bank, check, code, codes, diagnostic, engine, light, ls3, lucas, oil, p420, p430, pontiac, treatment

p430 and p420 and check engine light on

madmaxx42 on Jun 3, 2010

Jan 29, 2011 05:15 PM
by bighaas79

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7

5,304

PCM Diagnostics & Tuning

high, ls1, oil, p300, p420, pressure, trans

High Oil Pressure?

owlpuff on Aug 1, 2010

Aug 1, 2010 04:36 PM
by 71ANTICARB

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6

904

New LS1 Owners - Newbie Tech

2002, 2004, 40, cadillac, code, cts, firebird, hemi, normal, oil, p0420, p420, pontiac, pressure, regulator

Car throwing P0420 code and oil pressure above normal

SonicBoom on Mar 2, 2010

Mar 3, 2010 02:13 PM
by SonicBoom

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4

875

General Maintenance & Repairs

01, cats, clogged, code, emissions, firebird, general, hemi, impala, ls1, ls1tech, motors, p0420, p420, small, vacuum

What's a P0420 code?

415Z28 on Feb 25, 2010

Feb 25, 2010 09:16 AM
by Sales2@Texas-speed

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4

1,261

Generation III Internal Engine

1998, 2001, 2002, chevy, code, codes, engine, gmc, p420, p430, sierra, tahoe, truck, tuneados, z71

Tuning an 03 Z71 Tahoe

Gearhead-GM on Mar 16, 2009

Mar 16, 2009 06:29 PM
by Gearhead-GM

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2

1,673

PCM Diagnostics & Tuning

2000, 53, bank, chevy, code, codes, front, important, ls1, o2, p0430, p420, p430, rear, silverado

how important are o2 sensors?

jason1384 on Mar 13, 2007

Mar 14, 2007 03:04 PM
by marv

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8

1,248

New LS1 Owners - Newbie Tech

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

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2

1,468

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

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3

1,038

PCM Diagnostics & Tuning

420, bmw, code, p420

Could cut-out cause P 420 code?

BlueSix on Jul 17, 2003

Jul 17, 2003 01:42 PM
by BAD ASS TA WS6

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1

857

PCM Diagnostics & Tuning

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