Weird oil pressure issues

dfwvtxman · April 16, 2016

Just got my 1st oil change on my 2015 @ 4,000 miles. Afterward I'm noticing the oil pressures are all over the place. Before change it would show about right in the middle @ 40 and hardly move no matter what. Now it's going down to 30 and all the way up to 70. And all while steady driving. I watched it switch from V-8 to V-4 and back and it didn't cause any difference in the pressures.

I had the dealership check the oil and it shows full. Could there be issues or is this normal? Why didn't it move like this before oil change?

O_J_Simpson · April 16, 2016

Wrong weight of oil used or the pump is getting ready to bite the dust.

HondaHawkGT · April 16, 2016

Your truck should be fine. I just changed my oil yesterday and the oil pressure gauge did the same thing.

Instrument Cluster Oil Pressure Gauge

The oil pressure gauge needle oscillation is due to the two-stage oil pump self test. The ECM will perform a functionality test of the two stage oil pump after a cold soak, when the engine is first started and the vehicle is driven.

This functionality test will occur three times in a short time span and can be observed on the oil pressure gauge as a brief increase (spike) in the oil pressure gauge needle. Upon completion of the three tests, the self test will not occur again until after the engine is turned OFF and another cold soak has completed.

TIP: The exception to this self test occurs if the vehicle has come to a stop BEFORE the three tests have been completed. If that occurs, the self test will run again until the test can complete.

Additionally, at 3,500 RPM or greater, the two-stage oil pump switches over to high stage and the oil pressure gauge needle will move to the high position.

http://sandyblogs.com/techlink/?p=2139