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Cat problem?

panteramatt

Well-Known Member
Joined
February 28, 2003
Messages
114
Reaction score
0
City, State
south jersey
Year, Model & Trim Level
07 Mountaineer V8
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?
 




marragtop

Explorer Addict
Joined
April 14, 2001
Messages
2,075
Reaction score
0
City, State
balt, md
Year, Model & Trim Level
91, 92, 95, and 2000 xlts
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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