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Threads Tagged with po421

Threads Tagged with po421

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2000, catalytic, check, code, converter, converters, cylinder, engine, galant, mitsubishi, number, p0421, p421, part, po421, replace

Help needed with P0421

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Multi-page thread

1 2)

Chris68 on Dec 20, 2011

Dec 5, 2024 06:35 PM
by ANGELSPACE

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10

52,758

Mitsubishi Galant

code, po403, po421

P0421 & p0403 codes

TDM556 on Jul 22, 2014

May 2, 2021 09:52 PM
by Tiffne Pratt

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2

7,236

Mitsubishi Montero & Montero Sport

2002, 2006, cat, catalyst, code, error, flasher, lancer, mitsubishi, p0421, po421, pre, threshold, treshold, warm

2002 lancer...HELP

vguaman87 on Feb 24, 2010

Jun 29, 2020 05:31 PM
by Mosier89

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1

2,754

Mitsubishi Lancer and Lancer Sportback

Smile

0421, 1555a086, 2007, bank, catalytic, code, converter, converters, endeavor, jersey, location, mitsubishi, p0421, p0431, po421

If you need a new Catalytic Converter read this

mitslone on May 5, 2012

Jul 31, 2017 02:07 PM
by Maddoxnathaniel

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4

49,919

Mitsubishi Endeavor

01, 02, 0421, 2001, bank, code, codes, diamante, gettin, mitsubishi, p0421, po421, search, sensor, soark

2001 Diamante P0421 code, need to know which sensor and any other advice

jimmy pop on Jul 21, 2012

Jul 21, 2012 09:33 AM
by jimmy pop

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0

3,823

Mitsubishi Diamante

2007, 2007mitsubishi, catalyst, catalysts, endeavor, endevor, endevour, galant, header, lancer, mitsubishi, mitsubishiforum, p0421, po421, threshold, warm

2007 Endeavor P0421

livingthrudying on Jun 28, 2011

Jun 28, 2011 12:39 PM
by livingthrudying

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0

6,138

Mitsubishi Endeavor

02, 2000, 2004, 3000gt, 421, code, diamante, forum, galand, galant, lancer, mirage, misubishi, mitsubishi, po421

po421

jomo1989 on Apr 4, 2011

Apr 13, 2011 02:39 PM
by Galant82

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1

4,698

Mitsubishi Galant

Red face

02, 2000, 2002, code, cyl, es, galant, gallant, lancer, means, mitsigalant, mitsubishi, p0421, p0421code, po421

P0421 code, 2002 4cyl Galant

niteman on Mar 21, 2011

Mar 21, 2011 06:23 PM
by Sebba

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1

2,967

Mitsubishi Galant

3g, bubbling, clear, code, eclipse, endeavor, exhaust, fault, idle, mitsubishi, noise, p0421, po421, popping, sound

Getting a P0421 code! Popping sound in exhaust. Odd idle.

rowebil on Oct 20, 2010

Oct 20, 2010 06:44 PM
by rowebil

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0

2,672

car, code, codes, galant, ii, mirage, mitsubishi, obd, obdii, p0421, pass, pd, po421, smog, test, trouble

OBDII code P0421 - What should I do?

Meph1st0 on Oct 13, 2010

Oct 13, 2010 11:38 PM
by Meph1st0

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0

8,488

0421, code, dtc, dtcp0421, eclipse, mitsubishi, montero, p0421, po421, trouble

Dtc p0421

bob1952 on Aug 17, 2010

Aug 17, 2010 06:44 PM
by bob1952

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0

1,631

New Members Area

2001, bank, code, codes, eclipse, engine, fix, galant, gas, mileage, mitsubishi, po136, po141, po421, sensor

Codes PO421 & PO141 - How much to fix?

dc27 on Jul 30, 2009

Dec 23, 2009 03:35 PM
by kingkingwolf

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1

8,984

1999, bank, code, eclipse, ecu, efficiency, engine, error, light, mirage, mitsubishi, montero, p0431, po421, reset, threshold

OBD Reset?

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Multi-page thread

1 2)

don_zz on Aug 30, 2009

Sep 29, 2009 10:33 PM
by don_zz

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16

22,652

Mitsubishi Montero & Montero Sport

02, 2003, bad, code, codes, diamante, endeavor, galant, lancer, mirage, mitsubishi, mitsubishit, montero, p0421, plug, po421

P0421 Yes i searched..

Schnupper on Jul 10, 2009

Jul 20, 2009 07:11 PM
by dsm1990gsx

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7

2,796

Mitsubishi Lancer and Lancer Sportback

2003, 3000gt, code, eclipse, forum, galant, lancer, mirage, mitsubishi, montero, p0400, p0421, po421, problem, sport

P0400 & p0421

sierrenity on Apr 29, 2009

Apr 29, 2009 10:09 AM
by sierrenity

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0

3,498

Mitsubishi Mirage

, 2003, 2008, code, codes, dangers, driving, eclipes, eclipse, engine, mitsubishi, obd, outlander, p0421, po421, spyder, v6

OBD Code P0421

jmil on May 11, 2008

May 12, 2008 04:21 PM
by dsm1990gsx

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6

10,343

0421, 1, 2000, bank, cat, cataylic, code, converter, efficiency, error, mitsubishi, mitubishi, montero, pending, po421, sport, threshold, warm

2000 Monty full size engine light po421

bauhaus92 on Jan 21, 2008

Mar 13, 2008 06:00 PM
by jrmdir

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8

3,229

Mitsubishi Montero & Montero Sport

auto, catalytic, cataytic, code, com, converter, converteru, forum, mac, montero, obd, p0421, parts, po421, sport

'99 Montero Catalytic Converter & Mac Auto Parts

jrmdir on Jan 6, 2007

Jan 6, 2007 04:09 PM
by jrmdir

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0

7,321

Mitsubishi Montero & Montero Sport

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