These codes came up. Anybody know what I should be looking for. The motor has 225k
I’ve worked on regular gas engines this is my first with diesel. I changed the fuel filter housing. Reconnected the muffler with a new engine pipe. New thermostat. New air filter. On warm up very little power. Then it seems to have decent power. It was overheating. Changed the thermostat and it appears ok so far I will replace the radiator cap. The truck sat for 2 years before being driven. After I purchased it and did some restoration I drove it 150 mile to its present location in the mountains of Massachusetts. I’m taking it to Tucson within the next several months. That’s where I’m moving. Any direction would be greatly appreciated
PO254
335
381
404
251
P 1635
P1630