P0421 code: warm up catalyst efficiency below threshold (bank 1) P0421 – warm up catalytic converter bank 1 efficiency below threshold I have a 06 mitsubishi endeavor that has an error code p0421. the
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P0421 code, how to fix?Code p0421?: i'm getting that code, but i do know that the... P0421 code meaning, symptoms, causes & fixingP0421 — warm up catalyst efficiency below threshold (bank 1) – eeuroparts.
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P0421 – warm up catalytic converter bank 1 efficiency below threshold
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Code p0421?: i'm getting that code, but i do know that the...
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