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P0420 Honda Odyssey -

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Reset ECM to erase Code P0420, engine light came back on after driving 75 miles and stayed on. What may be causing this?

Vehicle: 2001, Honda Odyssey 3.5

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P0420 is for the catalytic converter not cleaning the burnt fuel effectively, most likely the catalytic converter you will have to reset the code drive it and see if the monitors complete

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