13 Pete 386 Low Oil Pressure

Check the pressure with a mechanical gauge first. Both oil filter and spinner seated correctly? Paccar brand filters? I have seen aftermarket filters not fit the housing correctly.

 

How many miles on truck? What is your oil change intervals? What weight and brand of oil. Any recent EGR issues?

 

Check with mechanical gauge as pushbroom stated. Pull both oil filters. Pay close attention to the bearings top and bottom of the spinner or centrifugal filter. Also check the oil pressure sensor for rational to the gauge versus ecm data. Sensor failures are not uncommon but usually fail high. Also inspect all of the o rings on the main oil filter element stand pipe. These dont get replaced with the filter and can wear or come up missing.

 

For sure. We have had more sensor/ wiring issues then oil pump failures.

 

You are just below the spec. Good thing to re-check filters and bearings with centrifugal filter. Upper bearing you have to replace cap, lower one comes as a kit. I would suggest getting an oil analysis to see if maybe you have higher than normal soot or fuel dilution. I have seen NOx codes that are actually caused by sooted up venturi tubes and sooted up air management sensors.

 

Check with your dealer but used to be that a little cap below the oilfilter would come apart.
This is inside the spinner.
That could lower the pressure
Longshot but worth asking about.