Code P0421 Mazda 3

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OBD code P0421, 1999 Mazda Protege — Car Forums at Edmunds.com

OBD code P0421, 1999 Mazda Protege — Car Forums at Edmunds.com

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Mazda 3 p0421 code: meaning, causes, how to fix

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P0421 code: warm up catalyst efficiency below threshold (bank 1)

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P0421 code: warm up catalyst efficiency below threshold (bank 1)

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P0421 my 2003 Mazda Protege5 needs a CalCat (California Catalytic
Mazda6/Ford Duratec 3.0L - Replacement (Walker direct fit) Manifold

Mazda6/Ford Duratec 3.0L - Replacement (Walker direct fit) Manifold

OBD code P0421, 1999 Mazda Protege — Car Forums at Edmunds.com

OBD code P0421, 1999 Mazda Protege — Car Forums at Edmunds.com

Got Engine code p0421 (catalyst efficiency below threshold bank 1

Got Engine code p0421 (catalyst efficiency below threshold bank 1

P0421 code, how to fix? | Mitsubishi Eclipse 3G Club

P0421 code, how to fix? | Mitsubishi Eclipse 3G Club

Check Engine Light on with Code P0421, How Do I Fix It?

Check Engine Light on with Code P0421, How Do I Fix It?

P0421 — Warm Up Catalyst Efficiency Below Threshold (Bank 1) – eEuroparts

P0421 — Warm Up Catalyst Efficiency Below Threshold (Bank 1) – eEuroparts

P0421 | Mazda 6 Forums

P0421 | Mazda 6 Forums

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