Have replaced 3 cats on this car at mileage interevals of 120K , 150K and at 172K. Muffler Shop told me Cats are failing because the front and rear oxygen sensors need to repaced. Did so on their recommendation and new cat replaced. Cat failed after 3K, now on 4th Cat converter. Muffler Shop told me that it is something wrong with the car and to take it to a Honda/ Acura shop. Please advise, car is running Great! Thanks, Jack
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2001 Acura Integra
Question: Replacing New Cat Converter after 3K due to check engine light code PC0420
Answer #1milesauto from Miles Auto Service Inc., May 25, 2012, 10:13Master
Could be you have a faulty leaking fuel injector or a faulty Air Mass sensor or any number of possible senarios. A good technicinian can diagnose to determine is there is another problem that is causing cats to fail. Also if you are having aftermarket less costly cat converters installed that in itself could be a major part of your problem. Cheap replacemement Cats do not satisfy the emmision standards due to having much less of the platiumin that the oriqinal equipment Cats have.
COULD BE ANYTHING WITH THE FUEL SYSTEM. DO YOUR HAVE A CK ENG LIGHT ON?