code problems

[CoJo6.5T]

my computer must be messed if the first code is suppose to be a 12 its screwed i just was lookin stuff up and desided to buy an oil pressure switch and it feel like it has more power and was nothing goin up to60 on the highway like it use to be and i thought the problem was fixed because the service engine light was comming on every day then i i shut the truck off and some times it goes off and some times it stays on and runs like crap with no power and if you get on it and let off real quick it spits and sputters and it really sounds like by buddys dodge 24v wen the injection pump went out i was ridding in the truck wen it quit so any one just tell me wat you think it is i kinda think it could be the pmd again its still under warrenty but i wish i could read a code to figure it out so if any one has a clue post back im begin

[CAdiesel]

Open the t-valve on the thermostat housing. Since you replaced your OPS if fuel doesn't shoot out your lift pump is shot. If you get code code 12 it means you don't have any stored codes. The PMD won't necessarily store any if it is going bad.

[cowboyupdan]

sounds like injection pump time but i'm not sure. my truck gave each code three times for each code and only gave a twelve after clearing

[CoJo6.5T]

Wel same here alot of 17 and 18 then random stuff that i cant remember then 12