So I was towing the camper last weekend and driving down the road my wait to start light came on. I just took a smarty off the truck And went back to a stock tune about a week before. So I cleared it and Started down the road again and then it did it about 20 miles down the road again. I believe it's defueling or something because the truck gets gutless When the light is on. Soon as I clear it's fine again. I just had a Turbo go out could this be something to do with it?? It seems to Only throw the code when there is a load behind the truck. I can drive it around town all week and nothing but as soon as I go up the mtn with a load it does it. The only code is p1222 (excessive fuel return). What do I do?