P0202/P2149 low oil pressure

cdprayor

Farmtruckin
Dec 28, 2013
45
0
0
Took a short road trip last sunday. About 1 1/2 hrs into it truck goes into limp mod. Pulled out my autocal and code p0202 and 2149. I knew I had read about it at sometime and the ice pick fix. I didn't have anything with me so I limped it into town 10 miles away and bought a circuit tester to puncture the holes with. Did the ice pick fix and truck ran fine. As soon as I get to the red light I get low oil pressure pop up. Pull over and check the oil. Everything is good and no diesel in it. Oil gauge read fine at highway speed but at idle it kept showing low oil pressure. Get back home and I change the oil. Same thing low oil pressure. I pulled ecu fuse and oil line to turbo. Cranked it over and oil shoots out so pump is fine. Today I start it up and sounds like crap. Sounds like a rod knocking and oil pressure gauge is fluctuating now. What does it sound like to you guys? Injector issue or rod knock? I want to check my flow rates with my autocal but haven't found out how to do it. Any suggestions?
 

gmduramax

Shits broke
Jun 12, 2008
4,072
248
63
Nor cal
Oil pressure fluctuating is not good. I would put a mechanical gauge on it to see if it's really fluctuating.
 

cdprayor

Farmtruckin
Dec 28, 2013
45
0
0
Looks like an injector problem for the knock. #2 I think. I can unplug the harness and start the truck and it goes into limp mode. Turn it off and plug the injector back up and it sounds fine until it builds pressure and knocking resumes. Waiting on my tuner to get back with me so I can see how to check my rates with my autocal
 

gmc502

Member
Jan 16, 2011
466
12
18
low oil pressure,knock on #2,,,I'd be pulling the oil filter and inspecting it for bearing material.
 

cdprayor

Farmtruckin
Dec 28, 2013
45
0
0
Well today I was going to try and hook my autocal up and look at flow rates but now it won't even start. Trying to post video.
 

cdprayor

Farmtruckin
Dec 28, 2013
45
0
0
Possible injector stuck open not allowing to build pressure? The knocking issues and all this began happening when I got a p0202/p2149 codes. After I did the "ice pick"trick it all ran fine and then started knocking and now it won't start.
 
Last edited: