p0421 - Mitsubishi Forum - Mitsubishi Enthusiast Forums - Threads Tagged with p0421

Mitsubishi Forum - Mitsubishi Enthusiast Forums
Tags
Threads Tagged with p0421

Page 1 of 2

1

Threads Tagged with p0421

Thread / Thread Starter

Last Post

Replies

Views

Forum

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

Help needed with P0421

(

Multi-page thread

1 2)

Chris68 on Dec 20, 2011

Dec 5, 2024 06:35 PM
by ANGELSPACE

Go to last post

10

52,680

Mitsubishi Galant

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

Go to last post

1

2,748

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

Go to last post

4

49,878

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 Sep 26, 2011

Jun 5, 2017 11:08 PM
by yatin_ash

Go to last post

2

19,366

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 Apr 15, 2013

Nov 6, 2016 06:29 PM
by Sic_Lucky

Go to last post

8

33,291

Mitsubishi Outlander

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

2003 Mitsubishi Lancer ES P0421, help , Please!

(

Multi-page thread

1 2)

kingkingwolf on Dec 23, 2009

Oct 29, 2013 08:08 PM
by Sebba

Go to last post

16

90,220

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

(

Multi-page thread

1 2)

cjean99 on Jan 24, 2013

Feb 28, 2013 05:25 PM
by cjean99

Go to last post

15

19,782

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 Oct 1, 2012

Oct 1, 2012 02:01 PM
by jarod027

Go to last post

0

2,630

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 Jul 21, 2012

Jul 21, 2012 09:33 AM
by jimmy pop

Go to last post

0

3,791

Mitsubishi Diamante

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

Check Engine Codes

Montero2001 on Feb 27, 2012

Jun 13, 2012 08:39 PM
by Jmchavez1986

Go to last post

3

4,470

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?

(

Multi-page thread

1 2)

kevin10 on Jun 23, 2007

Apr 4, 2012 10:50 PM
by mr.ozrally

Go to last post

16

17,082

Mitsubishi Lancer and Lancer Sportback

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

Please Help me with this Error Code

Chris68 on Dec 20, 2011

Dec 20, 2011 05:22 PM
by Chris68

Go to last post

0

3,242

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

(

Multi-page thread

1 2)

t-jacobs on Jun 21, 2011

Dec 13, 2011 10:11 PM
by alexsaspa

Go to last post

12

3,068

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 Jan 2, 2010

Aug 10, 2011 06:37 AM
by monterodiff

Go to last post

6

44,313

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 Jun 28, 2011

Jun 28, 2011 12:39 PM
by livingthrudying

Go to last post

0

6,131

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 May 19, 2011

May 19, 2011 04:22 PM
by mvious

Go to last post

0

2,968

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 Apr 7, 2011

Apr 8, 2011 09:08 PM
by jomo1989

Go to last post

1

11,824

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

Go to last post

1

2,963

Mitsubishi Galant

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

P0421 diag. code????

(

Multi-page thread

1 2)

HydroGuy on Jun 5, 2005

Mar 1, 2011 04:21 PM
by Fe2O3

Go to last post

11

38,966

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 Jan 20, 2011

Jan 20, 2011 10:23 PM
by jgbrules

Go to last post

1

2,908

Mitsubishi Montero & Montero Sport

Page 1 of 2

1

All times are GMT -5. The time now is 08:21 AM.