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Mitsubishi Outlander 2 Błąd P0431. This code basically means the o2 (oxygen) sensor downstream of the catalytic converter on bank 2, has determined that the converter is not working. I had the same thing on my 2001 full size montero with 183k miles.
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2007 mitzi outlander v6 petrol For example, diagnosing a p0431 in a mitsubishi may involve steps that are different from what the owners of other makes and models follow. Posted on oct 10, 2010.