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Threads Tagged with p0421

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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

46,280

Mitsubishi Galant

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

2,544

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

47,188

Mitsubishi Endeavor

02, 2001, 2002, code, diamante, diamonte, egr, flow, insufficient, mitsubishi, p0401, p0421, p0431, po401, valve

02 Diamante DTC P0401, P0421, and P0431

BamaMech101 on 09-26-2011

06-05-2017 11:08 PM
by yatin_ash

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2

18,394

Mitsubishi Diamante

Unhappy

0421, 07, 2007, check, ck, code, engine, mitsbishi, mitsubishi, ode, outlander, outlanr, p0421, p0431

help with check engine code P0421/P0431

07outie07 on 04-15-2013

11-06-2016 06:29 PM
by Sic_Lucky

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8

30,031

Mitsubishi Outlander

2002, 2003, catalytic, converter, engine, es, fix, lancer, mishibisi, mitsubishi, oxygen, p0421, problem, replace, sensor

2003 Mitsubishi Lancer ES P0421, help , Please!

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Multi-page thread

1 2)

kingkingwolf on 12-23-2009

10-29-2013 08:08 PM
by Sebba

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16

85,023

Mitsubishi Lancer and Lancer Sportback

01, 2000, 99, change, engine, idle, idol, mitsubishi, montero, p0305, p0421, ping, plug, rough, running, spark, sport, starting, tune

2000 Montero Sport LS Rough Idle

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Multi-page thread

1 2)

cjean99 on 01-24-2013

02-28-2013 05:25 PM
by cjean99

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15

18,241

Mitsubishi Montero & Montero Sport

1999, 99, abs, codes, engine, mitsubish, mitsubishi, montero, obd, p0421, protocol, read, sport, trouble

99 Montero Sport engine codes

jarod027 on 10-01-2012

10-01-2012 02:01 PM
by jarod027

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0

2,371

Mitsubishi Montero & Montero Sport

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

3,365

Mitsubishi Diamante

2000, 30, a1, bank, catalyst, check, codes, efficiency, engine, mitsubishi, montero, p0154, p0421, sport, threshold, warm

Check Engine Codes

Montero2001 on 02-27-2012

06-13-2012 08:39 PM
by Jmchavez1986

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3

3,748

Mitsubishi Montero & Montero Sport

03, 04, 2003, code, endeavor, lancer, leak, misfire, mitsu, mitsubishi, oxygen, oz, p0421, rally, sensor, vacuum

03 Lancer OZ rally,Code P0421?

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Multi-page thread

1 2)

kevin10 on 06-23-2007

04-04-2012 10:50 PM
by mr.ozrally

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16

15,968

Mitsubishi Lancer and Lancer Sportback

code, error, fault, galant, mitsubishi, outlander, p0420, p0421

Please Help me with this Error Code

Chris68 on 12-20-2011

12-20-2011 05:22 PM
by Chris68

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0

2,496

Mitsubishi Outlander

0421, 2003, check, code, downstream, engine, error, evo, galant, light, mitsubishi, mitusbishi, o2, oxygen, p0421, replaced, sensor, spyder, stream

1 Attachment(s)

New guy with CEL problem

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Multi-page thread

1 2)

t-jacobs on 06-21-2011

12-13-2011 10:11 PM
by alexsaspa

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12

2,637

New Members Area

01, 03, 2004, act, eclipse, engine, galant, lancer, light, mitsubishi, outlander, p0421, recall, ron, service

Service Engine Soon light code P0421

jvsutton on 01-02-2010

08-10-2011 06:37 AM
by monterodiff

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6

41,816

Mitsubishi Montero & Montero Sport

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

5,543

Mitsubishi Endeavor

2000, california, cat, cats, galant, internet, legal, low, mirage, mitsubishi, montero, p0421, pre, rpm, sport, tune, wires

FYI: P0421 Pre-cat CEL cleared after major tuneup

mvious on 05-19-2011

05-19-2011 04:22 PM
by mvious

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0

2,654

Mitsubishi Montero & Montero Sport

2004, check, code, codes, diamante, endeavor, engine, es, galant, light, limited, mitsubishi, montero, p0141, p0421, p0431

Fail smog codes P0431 and P0421

rford69 on 04-07-2011

04-08-2011 09:08 PM
by jomo1989

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1

10,930

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

2,772

Mitsubishi Galant

03, 1, 2002, bank, battery, eclipse, galant, lancer, mitsubishi, montero, p0421, password, reset, threshold, unplug

P0421 diag. code????

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Multi-page thread

1 2)

HydroGuy on 06-05-2005

03-01-2011 04:21 PM
by Fe2O3

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11

37,726

Mitsubishi Lancer and Lancer Sportback

01, 2000, 2001, circuit, code, codes, control, egr, fix, mitsubishi, montero, p0401, p0403, p0421, sport, trouble

2001 Montaro Sport 2.5

dallas11 on 01-20-2011

01-20-2011 10:23 PM
by jgbrules

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1

2,673

Mitsubishi Montero & Montero Sport

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