Mazda Protege P Codes (Powertrain) P0400 - P0499 P0421

Browse Mazda Protege P Codes (Powertrain) P0400 - P0499 P0421 questions and answers. Choose a question that matches your symptoms.

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P0421 (sometimes P0300 And P0660)

2002 MAZDA PROTEGE
Hello All. Please Help Me Out! :-( I Love My Car! I Have A Stock 2002 Mazda Protege5. There's No Shortage Of P0421 Threads On This...
1 ANSWER
Asked by sailingsenses

2001 Mazda Protege P0421

2001 MAZDA PROTEGE
Mil On, Went To Check For Code, It Show P0421, Last Year Replaced Cat. Coil Packs, And Cables +sparks, Found Different Code And I Replaced...
2 ANSWERS
Asked by Guayas007

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