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cat question

CMAHON

NAXJA Forum User
Location
Arlington, TX
my 01 4.0hp has been throwing a p0432 code. i replaced ALL 02's and still got the same code. now my question is can a cat be cleaned or repaired (i don't know how their made or work) or do i have to bite the bullett and buy a new one?
 
If you have the Cali emission package with the two pre cats and 4 O2 sensors, only the precats are monitored by the PCM.. the third large cat isn't monitored.

So if it is telling you a cat is bad it is the pre cats. However, before replacing them I would check the wiring harness and I think there are some fuses for the O2 sensor heater circuits.

There may also be a longer warranty on the emissions related equipment.
 
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