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Stock 1995 - 2001 Explorers Questions related to non-modified 1995-2001 Explorer, Mountaineer, Ranger and '02+ Sports and Sport Trac. Problem solving, maintenance, TSB, service bulletins, owner reviews, specifications.

Cat problem?

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Old 06-29-2009, 01:15 PM   #1
panteramatt
south jersey
07 Mountaineer V8
 
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Cat problem?

Had my wifes 97 explorers computer ran since its had a check engine light and it came back as p0420, catalyst efficiency below threshold bank 1. Does this mean the cats are bad or the o2 sensor? Which ones are they? Any fixes?
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Old 07-02-2009, 06:34 PM   #2
marragtop
balt, md
91 xlt, 92 xlt, 95 xlt
 
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If the truck is running ok, I'd reset the codes and see if the CEL comes back on. Could be a false reading.




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