Yesterday driving down the freeway I noticed a big poof of white smoke coming out the exhaust. Not worried about that it happens when I get on the gas petal during regen. I see it every now and then. Within 5 mins after my CEL came on. Went to the shop this morning and I don’t have the code but he told me it was a fuel sensor error. Not sure exactly what it is and I don’t have time to leave it for a diagnosis. Any thoughts? Not sure if one thing leads to the other just seems odd the CEL came on right after regen. #9 injector???