Quote:
Originally Posted by williaty
Ceramic coating won't prevent the P0420 DTC. Been there, tried that. Wrapping them will prevent it under some environmental conditions, but not all of them.
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So you agree that it's a heat issue? Interesting... What about cat placement? I wonder if the guys getting this code have the cat back far enough that it's not getting hot enough.
I'd have to assume that wrap and having the cat immediately follow the header would be the best setup for these newer cars (07+, right?)