I think I've gelled up again. This time throwing the code listed above after truck started to die after trying to drive. It starts fine, idled for about 10-15 minutes, tried to drive and it started to lose power and chug. Fuel was treated with RevX winter and Archoil. I've gelled up twice before and have never thrown this code. I noticed the other day when I started it about 16 degrees without block heater plugged in it started lopping. Eventually it stopped and ran fine. No codes then. I'm gonna change filters and run some diesel 911 through it. Do you think gelled fuel code cause the code? I'm at 109,000 miles on original injectors. Thx. Levi.