2002 DODGE CARAVAN

2002 DODGE CARAVAN
158,600 MILES • 6 CYL • 2WD • AUTOMATIC
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TAZ
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i have a dodge caravan 2002 with a code po420 what does that mean? runs fine, no noices
Jul 26, 2011 at 7:32 PM
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DOCFIXIT
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Catalytic convertor operating below threshold efficiancy
Jul 26, 2011 at 7:35 PM
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TAZ
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THANKS.... BUT WHAT IM SUPPOSE TO DO WITH IT CHANGE IT CLEAN IT OR WHAT. I HAVE CHANGE ALREADY THE TWO OXIGEN SENSOR
Jul 26, 2011 at 7:46 PM
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DOCFIXIT
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If no exhaust leaks or contamination occured then CAT is faulty
Jul 26, 2011 at 7:48 PM