po421 - Mazda3Club.com : The Original Mazda3 Forum - Threads Tagged with po421

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Threads Tagged with po421

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01, 1, 2005, bank, cat, catalyst, check, code, efficiency, engine, mazda, muffler, po421, pre, protege, removing, threshold

Check Engine (PO421) trouble.

mp5wgn on Aug 30, 2005

Oct 2, 2016 04:10 PM
by ldstia@yahoo.com

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12

45,344

3rd gen Engine/Drivetrain

04mazda3, 09, 2002, auto, check, code, codes, emmisions, engine, innova, light, losing, mazda, p0421, po421, power, protege, zone

Engine code PO421

minihaha on Feb 19, 2006

Mar 4, 2006 09:04 AM
by mgs_freak

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4

14,867

3rd Gen Protege/MazdaSpeed/P5/MP3

2000, 2003, car, check, code, engine, es, explain, fix, fixed, light, mazda, p0421, po421, precat, protege, resolved

trouble code P0421

mrjiggy on Mar 17, 2003

Mar 18, 2003 08:33 AM
by protetype

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4

8,546

3rd Gen Protege/MazdaSpeed/P5/MP3

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