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I wouldn't call it a fatal flaw, but I had this issue about 300 miles into my 2nd day of ownership. Dash was going WILD, every error under the sun going on. Found a post saying to check that harness near the exhaust. Found mine making contact, tucked it back under the heat shield and it's been...

@GGSLE21B - just wanted to say thanks for the post and photos! My 21 eco diesel started this error w/ 250 miles on it. I too found the harness outside of the heat shield. I tucked it back in and it has been good to go. I might take it another step and wrap the harness w/ some heatshield tape...