P0420 And Bad Gas Mileage

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C/S check for bad gas mileage : r/Justrolledintotheshop

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Bad gas mileage: 4 things that could be the reason

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Cheap Catalytic Convertor getting P0420 same gas mileage | PriusChat

Weird, inconsistant p0420 situation. fluke? bad gas? elevation

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Entry #2 by mrcontrapos for why is my gas mileage so bad?

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Weird, inconsistant P0420 situation. Fluke? Bad gas? Elevation

P0420 error code causing poor gas mileage : r/cruze

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