06-28-2014, 11:10 AM
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#11 (permalink)
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EcoModding Lurker
Join Date: Jun 2014
Location: Houston
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Quote:
Originally Posted by jcp123
Maybe. If the honeycomb melted and is clogging the pathway, it sure could impact your mileage. If all it is, is a substrate material which has been "used up", it should have only a minimal impact on MPG. Downstream O2 sensors barely factor into your fuel trims. If you only got p0420 today, I doubt the computer is correcting anything enough to affect MPG.
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Ok thank you
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