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Oil gauge

jimj582

By jimj582
in Troubleshooting & Recalls

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jimj582 New Member

jimj582

Posted
Posted

This maybe a silly question but i've noticed in my 2014 GMC sierra that the oil pressure gauge moves a lot, even at a stand still. I'm aware that the pressure will change as you accelerate, but it does it while stopped at a red light. Is that normal?

haider320 Enthusiast

haider320

Posted
Posted

Mine moves depending on the amount of acceleration. I don't remember it ever moving at a stop though. I'll have to look next time.

Dulanski New Member

Dulanski

Posted
Posted

My oil gauge will drop at standstill, had the same thing happen with my 2009 & 2013. I don't think that there is reason to be concerned, it has something to do with the two stage oil pump self test.

newdude Senior Enthusiast

newdude

Posted
Posted

I'm gonna say normal. These trucks have a two stage pump as well, which may produce a bit more fluctuation than an older truck.

  • 2 months later...
albe1234 Enthusiast

albe1234

Posted
Posted

Quick question....are these "real" gauges or just some movement created by the ECU? Some vehicles now show an analog gauge where the needle moves with engine rpm but they are just some algorithm written into the ECU not a true indication of engine oil pressure.

Al

  • 6 months later...
Aznative Enthusiast

Aznative

Posted
Posted

my 2014 silverado is at dealer now, oil gauge doing really weird thing. I know when you are sitting idle oil pressure drops and as you accelerate pressure goes up etc. My truck normall sits about 40psi when driving with cruise on at 40mph or so. Just recently the gauge will jump around to up to 60+ back down to 20-25 bounces around like a test meter for maybe 2-4 seconds then settles back to 40psi, first time it did it and I noticed it I had just had oil change I thought oh hell they under filled the oil and I am sucking air? but nope oil level was fine. I don't stare at my gauges but in the last couple weeks I have happened to notice it do the jump around 4 or 5 times even at higher speeds but cruise set no acceleration.

Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted (edited)

I can't remember where I read this but the oil gauge will jump around because the system is running through some pressure tests. It does this once every engine on/driving cycle. If you accelerate or drive during this test, the test will stop and resume the next time you come to a standstill which is why you may be noticing this at random times when you're stopped. As long as your pressure stays around 40 for the most part like it should and your computer isn't throwing any codes or dash lights, I don't see a need to worry.

Edited by Silverado-Hareek
txab Senior Enthusiast

txab

Posted
Posted

I'm gonna say normal. These trucks have a two stage pump as well, which may produce a bit more fluctuation than an older truck.

 

 

 

^^^This

  • 2 weeks later...
Trackman101 Enthusiast

Trackman101

Posted
Posted

my 2014 silverado is at dealer now, oil gauge doing really weird thing. I know when you are sitting idle oil pressure drops and as you accelerate pressure goes up etc. My truck normall sits about 40psi when driving with cruise on at 40mph or so. Just recently the gauge will jump around to up to 60+ back down to 20-25 bounces around like a test meter for maybe 2-4 seconds then settles back to 40psi, first time it did it and I noticed it I had just had oil change I thought oh hell they under filled the oil and I am sucking air? but nope oil level was fine. I don't stare at my gauges but in the last couple weeks I have happened to notice it do the jump around 4 or 5 times even at higher speeds but cruise set no acceleration.

Mine does the same thing.

tbarn Senior Enthusiast

tbarn

Posted
Posted

Quick question....are these "real" gauges or just some movement created by the ECU? Some vehicles now show an analog gauge where the needle moves with engine rpm but they are just some algorithm written into the ECU not a true indication of engine oil pressure.

Al

IPC stepper motors driven by IPC via network connections to other modules including ECM

gone_fishing Enthusiast

gone_fishing

Posted
Posted

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

  • Like 1
  • 2 weeks later...
Aznative Enthusiast

Aznative

Posted
Posted (edited)

The dealer could not duplicate on mine even though the tech drove it quite a ways I told them it just does it ever so often. Mine does this bounce around after engine has been on quite a while one day I was on the freeway had been driving for 20 mins early morning light traffic cruise on 65 happen to look at oil gauge it jumps up to 60 or more then bounces back to like 25 then moves back up then just as quickly as it starts the gauge settles back into 40psi and does not do it again for a while, it may do it more often than I observe but I don't tend to stare at my gauges, it seems to do it a lot when on cruise control around 40mph if I could safely do it and know when it is going to do it I would video it with my smart ass phone to show the service advisor?

Edited by Aznative
  • 3 years later...

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