po421 - Mitsubishi Forum - Mitsubishi Enthusiast Forums - Threads Tagged with po421

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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

Chris68 on 12-20-2011

01-22-2024 08:46 PM
by Michael Davis

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9

46,500

Mitsubishi Galant

code, po403, po421

P0421 & p0403 codes

TDM556 on 07-22-2014

05-02-2021 09:52 PM
by Tiffne Pratt

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2

6,221

Mitsubishi Montero & Montero Sport

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

2002 lancer...HELP

vguaman87 on 02-24-2010

06-29-2020 05:31 PM
by Mosier89

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1

2,548

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 05-05-2012

07-31-2017 02:07 PM
by Maddoxnathaniel

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4

47,277

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 07-21-2012

07-21-2012 09:33 AM
by jimmy pop

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0

3,370

Mitsubishi Diamante

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

2007 Endeavor P0421

livingthrudying on 06-28-2011

06-28-2011 12:39 PM
by livingthrudying

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0

5,569

Mitsubishi Endeavor

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

po421

jomo1989 on 04-04-2011

04-13-2011 02:39 PM
by Galant82

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1

4,201

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 03-21-2011

03-21-2011 06:23 PM
by Sebba

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1

2,791

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 10-20-2010

10-20-2010 06:44 PM
by rowebil

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0

2,460

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 10-13-2010

10-13-2010 11:38 PM
by Meph1st0

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0

7,709

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

Dtc p0421

bob1952 on 08-17-2010

08-17-2010 06:44 PM
by bob1952

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0

1,493

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 07-30-2009

12-23-2009 03:35 PM
by kingkingwolf

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1

8,676

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

OBD Reset?

(

Multi-page thread

1 2)

don_zz on 08-30-2009

09-29-2009 10:33 PM
by don_zz

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16

20,282

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 07-10-2009

07-20-2009 07:11 PM
by dsm1990gsx

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7

2,570

Mitsubishi Lancer and Lancer Sportback

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

P0400 & p0421

sierrenity on 04-29-2009

04-29-2009 10:09 AM
by sierrenity

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0

3,249

Mitsubishi Mirage

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

OBD Code P0421

jmil on 05-11-2008

05-12-2008 04:21 PM
by dsm1990gsx

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6

9,684

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 01-21-2008

03-13-2008 06:00 PM
by jrmdir

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8

2,991

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 01-06-2007

01-06-2007 04:09 PM
by jrmdir

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0

6,368

Mitsubishi Montero & Montero Sport

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