(2000 6.5TD L65 Thomas Built Bus) I was coasting approximately 20mph, no throttle with 17 passengers. The fuel tank had a bit over 1/8 diesel onboard. The engine stalled, the brake light illuminating was what clued me in to the fact the engine had stalled. That is how smooth this vehicle is. The current mileage is 111,500, purchased with 110,800 on the clock. During the stall I placed the trans in neutral, restarted instantly with no trouble, did not even come to a complete stop. Upon restarting the SES light was on, codes are P0251, P0236, & P0238. I am aware that P0251 can be set from hard maneuvering while low on fuel. We were just a few miles from where we were to drop off our passengers, at what point we had planned to refuel before this occured. We purchase our fuel from a Pilot truckstop & use Diesel Kleen fuel additive. The engine now takes a few extra seconds to crank now, upon starting it rattles for 2-3 seconds (sounds like a big block gas engine dieseling when shutting it off). After pulling the codes, I had half a tank of fuel onboard, cleared the codes, & upon restarting the SES light was immediately on again. In the morning I will use my friends scanner to see which code/how many codes are stored this time. Once the engine is running, it runs great, no smoke like always. Have any of you guys had these 3 codes that I listed occur before ?? Any ideas/help would be great. Thanks for your time.