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Discussion Starter · #1 ·
Hey guys-

So on my way home from deer camp on Sunday my LML threw a code P0420 and the smoke coming out of the tailpipe was as thick as a pile of burning tires.

Did a search, and it seems as if the DOC or the hydrocarbon injector is at fault. Truck's sitting at the dealership now awaiting a formal run-through.

Anyone have any further insight as to what might have caused this? I usually run B10 fuel, and throw some PowerService in every few thousand miles to make sure stuff says clean. Truck has 20K miles on it, and it's already had one fuel filter change. Is there anything I can do to prevent this once I get the truck back?

Thanks in advance-
 

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Discussion Starter · #3 ·
Bone stock. Haven't done a thing to it yet. Wanted to keep the warranty on this one-and I'm glad I did!
 
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