Originally Posted By: Vikas
I strongly disagree with the previous responses. At 124K, it is your CAT which has become *SLIGHTLY* weak. Unfortunately the manufacturer has coded the computer to be very strict and thus you get the P0420 code. This is all a guess unless you do proper diagnosis using good scanner or better and oscilloscope.
If you want to change parts without doing that, then putting another OEM converter will fix it for next 100K miles. If you put an aftermarket, it will remain fix for next 5-10K miles before the light will come on.
There is a lot and I mean *LOT* of information available if you are willing to do the research on P0420.
- Vikas
$100 says this is the right answer.
I have a different make, but the same code @ around 130K. Honeycomb material was breaking up & rattling around. Replaced the cat with OEM, fine ever since. Now at 180K.
I strongly disagree with the previous responses. At 124K, it is your CAT which has become *SLIGHTLY* weak. Unfortunately the manufacturer has coded the computer to be very strict and thus you get the P0420 code. This is all a guess unless you do proper diagnosis using good scanner or better and oscilloscope.
If you want to change parts without doing that, then putting another OEM converter will fix it for next 100K miles. If you put an aftermarket, it will remain fix for next 5-10K miles before the light will come on.
There is a lot and I mean *LOT* of information available if you are willing to do the research on P0420.
- Vikas
$100 says this is the right answer.
I have a different make, but the same code @ around 130K. Honeycomb material was breaking up & rattling around. Replaced the cat with OEM, fine ever since. Now at 180K.
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