I was driving today and out of the blue oil pressure goes to zero then pops back up to 40+ threw a code of p0524. Checked oil level and everything looks ok. You can sit and let it idle at 40+ it drops to zero suddenly you shut it off and restart the truck and it is at 40+ again. No knocking or anything just dont want to hurt anything. Hopefully just a sending unit, I also notice if you bring the rpms up a couple hundred as it is falling to zero it recovers and back up to 40+

 

When was the last time you changed the oil filter and what brand do you use?

 

Last week rotella 15w 30 and the filter Im unsure of I usually use fram but I was beside the road broke and the mobile mechanic supplied the filter I think it was from napa I think they have wix

 

I would change the filter again with a Mopar filter, you hear a lot of bad things about Fram on our Cummins engines.

Also pull the sender and look for debris. If the pressure reacts to engine RPM then it is most likely a real pressure issue. Also remember that the gauge on the dash does not read the actual pressure. If the pressure is over a set threshold then it reads the same no matter what it is. If it is below the threshold it reads very low. It sounds like you are right at the threshold for the ECM to have normal or no pressure on the dash.

 

Well that could explain it right there. Frams are a big no no. Not approved for use on a cummins because they can come apart internally and debris can clog piston cooling nozzles. Broke down how and what was done to get going again??

 

There is not a fram on it right now but I will change it out.Im going to hook a mechanical up tomorrow.

 

I trashed a turbo, changed oil and filter when new turbo was put on. I looked on my receipt and it was a napa gold filter.

 

Install a mechanical gauge to verify oil pressure. Drive it with the gauge on it till the concern duplicates. Oil pumps are known to fail once and a while, not common but it does happen.


Tim

 

Injector hung open problem solved

 

Need more details. Even if you filled the crank case with #2 instead of 40w15 you should still have pressure.