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Threads Tagged with po421

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2002, po421, protege5

'02 MP5 automatic code P0421

ncalvinn on Oct 16, 2020

Oct 16, 2020 05:19 AM
by grim_reaper

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1

1,214

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

98 Proteger P0421 code

brown_devil on Oct 24, 2011

Oct 26, 2011 08:35 PM
by tanprotege

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1

3,259

2001, bank, cadillac, cartalitic, catalytic, code, conerter, converter, coverter, fouler, mazda, mpv, po421, rear, remove, trick

2001 MPV Catalytic Converter

sunycar on Sep 15, 2011

Sep 15, 2011 05:35 AM
by sunycar

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0

3,023

2003, bypass, catalytic, codes, converter, error, ho2s11, location, mazda, mpv, obd2, obdii, odb, po421, rough, running

2003 MPV Running rough OBD2 Error Codes

Damin69 on Aug 16, 2011

Aug 16, 2011 11:49 AM
by Damin69

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6,613

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

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

santa6 on May 24, 2011

May 25, 2011 01:26 PM
by keninn

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5

5,028

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

P0421

brian21740 on Nov 5, 2010

Nov 26, 2010 04:53 PM
by dasilvarenegade

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1

6,122

Mazda 323,Mazda 626 & Mazda 929

code, miata, po421

O2 sensor (did search)

ntstock93 on Mar 1, 2010

Mar 7, 2010 10:56 AM
by ntstock93

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3

1,561

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

p0300 and p0421

drac2000 on Feb 24, 2010

Mar 2, 2010 12:29 AM
by cogaivotchong

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1

5,184

code, mazda, miata, mpv, p0421, po421

MPV with P0421 code

NightSwimmer on Mar 18, 2009

Mar 18, 2009 06:42 PM
by NightSwimmer

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3,697

04, 2002, 421, check, code, engine, light, lower, mazda, o2, po, po421, protege, protege5, sensor

New Cat and o2 still get PO421 code

fast951 on Jan 7, 2009

Jan 8, 2009 03:21 PM
by darkstar4100

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2

4,195

2001, 25l, catalytic, code, codes, converter, mazda, mellenia, miata, millenia, obd2, p0421, part, po421, precat, trouble

trouble code P0421

maddflavor on May 6, 2008

May 22, 2008 04:51 PM
by piggylover1985

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5

16,594

00, bank, catalyst, fuel, mazda, mazda6, millenia, mpv, po170, po421, po431, protege, threshold, trim, warm

2000 Millenia S

timysemi on Apr 24, 2008

Apr 25, 2008 01:39 PM
by keninn

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3

2,646

20, 2001, blinking, cel, code, codes, es, flashing, mazda, misfire, p0300, p0421, po300, po421, protege, random

Flashing CEL - P0300 & P0421 - 2001 2.0 ES

adrockin on Apr 9, 2008

Apr 10, 2008 08:26 AM
by nelsonjere

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1

4,792

1998, 626, 98, bad, cat, check, code, engine, mazda, o2, p0421, po421, post, pre, protege, symptoms

98 Protege P0421 Check engine light

brown_devil on Jan 16, 2008

Mar 1, 2008 09:12 PM
by JAXCANE

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3

5,874

bank, mazda, millena, mpv, po421

Cats

Tbird on Jan 29, 2008

Jan 31, 2008 12:20 AM
by Tbird

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2

1,666

2001, cap, code, codes, diagnosis, diagnostic, gas, madza, mazda, mpv, p0421, p0481, po421, protege, reset

2001 mpv p0421 and p0481 codes

lane stradler on Sep 20, 2007

Sep 22, 2007 05:39 PM
by hixx

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5

11,089

2000, engine, fuel, hesitation, long, low, mazda, mpv, p0421, po421, rpm, spec, system, term, trim

P0421 and Hesitation at low RPMs

TIonLI on Sep 17, 2007

Sep 17, 2007 07:30 PM
by TIonLI

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1

5,323

0421, 1, 2000, bank, code, dtc, engine, mazda, miata, mpv, p0421, pending, po421, trouble, van

Engine light code P0421

lmt67c on Aug 13, 2007

Aug 14, 2007 07:16 AM
by bobbyt46

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1

5,677

02, 1999, 2007, cel, check, cleared, engine, light, maxda, mazda, miata, milennia, p0421, po421, sensor

P0421 check engine light

ChrisMazda on May 30, 2007

Jun 1, 2007 11:59 PM
by ChrisMazda

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2

8,049

Mazda Miata (MX-5)

1997, 20, 626, 97, car, code, engine, error, falla, lx, mazda, p0421, po421, po421mazda6261997dx

Error P0421 mazda626 Help

mazda390 on May 17, 2007

May 17, 2007 05:52 AM
by mazda390

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0

2,359

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