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Threads Tagged with p0421

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323, p0421

Mazda 323 P0421

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azexian on 03-08-2016

03-23-2016 10:51 PM
by Sparky202

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20

5,747

Mazda 323,Mazda 626 & Mazda 929

cataclean, clear, fails, mazda, misfire, p0421, protege

00 Protege - Misfire? No code?

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N628PW on 01-25-2014

02-13-2014 07:32 AM
by UseYourNoggin

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10

14,721

02, bank, exhaust, fuel, locations, manifold, mazda, millenia, negative, oxygen, p0421, p0431, replacing, sensor, short, term, trim, video

1 Attachment(s)

Help with P0421, P0431 codes, '02 milly s

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LuckyJack on 11-30-2013

01-01-2014 08:41 AM
by Juanky

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20

16,701

03, code, dies, mazda, mazdaspeed, p0090, p0421, prc, protege, protege5, random, solenoid

CEL problems...

kasruesao on 12-03-2013

12-03-2013 07:13 PM
by UseYourNoggin

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4

4,535

0421, 1195, code, finecel, mazada, mazda, miata, millenia, obd, obd2, obdii, p0421, p1195, protege, runs, wwwobdcodescomp0421

OBD codes P1195 & P0421

erikaroe on 07-07-2010

05-19-2013 08:42 AM
by UseYourNoggin

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2

7,472

Exclamation

2006, 2010, 25, 67000, bank, change, check, engine, kbb, light, mazada, mazda, mazda6i, p0421, plugs, spark

2010 Mazda 6 67000 Miles Check Engine Light Help Misfire issues

mazda6pittsburg on 01-26-2013

03-05-2013 08:13 AM
by UseYourNoggin

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5

7,820

5, cat, mazda, mazda5, p0421

Is it hard to replace the cat on my 2007 mazda 5!!

turbo3000 on 11-10-2012

11-10-2012 08:12 AM
by turbo3000

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0

1,240

323, ca, code, mazda, p0421, pass, report, smog

Help passing CA SMOG!

david.fhs on 07-28-2011

11-11-2011 12:59 PM
by Robdog

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1

2,357

Mazda 323,Mazda 626 & Mazda 929

02, 04, 98, code, mazda, oxygen, p0421, p0421code, pcm, po421, protege, received, replace, sensor, upstream

98 Proteger P0421 code

brown_devil on 10-24-2011

10-26-2011 08:35 PM
by tanprotege

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1

2,927

0100301, bank, bulletin, bulleton, cat, item, mazda, mazda3, millenia, number, p0421, po421, service, technical, tsb

P0421!?!?!?!?!?!

santa6 on 05-24-2011

05-25-2011 01:26 PM
by keninn

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5

4,580

case, egr, exhaust, leak, mazda, p0421, protege, valve, youtube

Egr

ntstock93 on 04-15-2011

04-29-2011 08:34 PM
by Big Money

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4

2,166

1998, 98, autoxray, check, code, codes, dx, engine, forum, mazda, p0421, p0505, p1195, protege, troble, trouble

1998 Mazda Protege Trouble code help?

doug2060 on 01-31-2011

02-01-2011 06:15 PM
by darkstar4100

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1

4,417

1998, 2000, 50, 98, code, computer, diagnostic, fix, mazda, miles, p0400, p0421, p1195, protege, resetting, troubleshoot

P0421 & P0400 98 LX 5speed protege

flystarrain on 01-09-2011

01-09-2011 03:53 PM
by flystarrain

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0

2,886

01, 2000, 626, bank, catalytic, codes, converter, mazda, mpv, p0421, plugs, po421, recently, replaced, spark

P0421

brian21740 on 11-05-2010

11-26-2010 04:53 PM
by dasilvarenegade

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1

5,348

Mazda 323,Mazda 626 & Mazda 929

1999, cat, catalytic, converter, fix, mazda, miata, neko11, p0421, pre, precat, protege, sensor, twc, wutwc

P0421 and not changing the WU-TWC (or precat)

neko11 on 11-15-2010

11-15-2010 10:48 AM
by neko11

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0

7,768

1996, 2000, 626, code, codes, diagnostic, forum, forums, mazda, mazda6p0421, miata, millenia, mpv, p0421, repair

Fault Code P0421

jwelsh86 on 03-16-2010

03-30-2010 12:44 PM
by zr1mark

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1

4,258

Mazda 323,Mazda 626 & Mazda 929

0421, 17, 2007, 323, check, code, codes, engine, fault, faultcode, fly, mazda, p0421, pending, protege, setting

Fault Code P0421

jwelsh86 on 03-16-2010

03-24-2010 09:06 PM
by jwelsh86

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5

12,840

2002, 626, code, madza, mazada, mazda, miata, millenia, millina, p0300, p0421, po300, po421, protege, reads

p0300 and p0421

drac2000 on 02-24-2010

03-02-2010 12:29 AM
by cogaivotchong

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1

4,353

Exclamation

2000, 2001, 99, computor, fix, gas, inside, mazda, mazda6, millenia, oil, p0421, problems, protege, smell

Catalyst and Gasoline Smell- Mazda Millenia S '99

millenia s on 01-23-2010

01-24-2010 03:10 PM
by millenia s

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3

5,090

01, 1999, 626, check, code, codes, engine, mazda, miata, p0300, p0421, po300, protege, protoge, tribute

Check Engine Code _ P0300 & P0421

jackgl on 10-07-2009

10-08-2009 05:25 AM
by hixx

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1

5,546

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