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Posted on Feb 12, 2010
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Mitsubishi pinin fault code P0421

I have a 2003 mitsubishi Shogun Pinin which keeps producing the fault code P0421 every 150 km

the 2 o2 sensors are ok

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kevingsuzuki

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  • Mitsubishi Master 752 Answers
  • Posted on Feb 12, 2010
kevingsuzuki
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Yes this is your catalytic convertor is clogged you have to change before is damages ur o2 sensors

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