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Old 11-10-2008, 09:39 PM   #1
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Catalytic Converter ineficent

Well my moms 2000 crv just got a cat inefficient code, I think it was p0420. It just got a brand new cat. The old ones heat shield was falling apart so i needed some stuff on summit so i just ordered a new whole new cat. This is the cat I bought
MagnaFlow 23767 - MagnaFlow Direct-Fit Catalytic Converters - summitracing.com
It seemed good quality it is a little smaller than the OEM one. Do you think this is caused by the new cat not being up to the task o the slight chance that the 02 sensor is at fault. BTW it has a 115k on it.

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Old 11-12-2008, 07:15 PM   #2
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Anybody?

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Old 11-12-2008, 07:42 PM   #3
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Some of the high-flow aftermarket units have to heat up before they will clean the air up enough to not trigger the O2 sensor. I would test the sensor before cutting into the exhaust.
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Old 11-12-2008, 09:00 PM   #4
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that code 420 is basically always acurate. lots of aftermarket cats will give you this prob. first gotta make sure the cat is obd 2 compatible. the computer uses data from both o2 sensors, and it is good at recognizing when any or either sensor is unreliable. even if the cat says obd2 compatible doesn't mean it won't throw that code on your jeep.

i get the pleasure of seeing this problem a lot with these "valesquez" muffler shops all around, throwing on dirt cheap exhaust, and then the cars won't pass emissions.
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Old 11-12-2008, 09:01 PM   #5
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and how come when i click on application on your link, it says its for a honda?
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Old 11-12-2008, 09:21 PM   #6
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and how come when i click on application on your link, it says its for a honda?
Quote:
Originally Posted by 4.0l sahara View Post
well my moms 2000 crv just got a cat inefficient code,
:d
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Old 11-12-2008, 09:25 PM   #7
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Honda's are very picky when it comes to non honda parts. My guess would that is part of the issue. I will guess its non returnable?
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Old 11-12-2008, 10:15 PM   #8
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Are there parts for 1996+ applications that don't HAVE to be ODB II capable? I was under the impression that it was required now. I guess I understand older stuff wouldn't need or have to be compliant.

Has anyone had that issue before? Just trying to keep my eyes open.
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Old 11-12-2008, 10:21 PM   #9
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:d

whoops , thanks for pointing that out. i assumed we were talking about his jeep, i skimmed over the honda part.

either way i see aftermarket cats that even say obd2 compliant that can throw that code. it is a common problem now with stricter emissions, and like someone already stated, these cars are picky about this part.

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