Code P0421

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

Check engine light on with code p0421, how do i fix it?

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

P0421 – warm up catalytic converter bank 1 efficiency below threshold

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

Code p0421?: i'm getting that code, but i do know that the...

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P0421 code

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