Hi oil pressure & pressure with engine off???

[daddyrim]

Suddenly today, my oil gauge started to climb and was right at 550. I happened to be by a service station so I pulled in. Was down a quart so I topped it off, but noticed that as soon as I turn the ignition to the ‘on’ position, I have oil pressure showing at 275 (engine not running), which is right around normal if the engine is actually running. But how can I have oil pressure with the engine off???

Now it seems no matter what, when I’m driving the gauge is pegged at 550.

Any idea what is happening???

 

[daddyrim]

Engine pressure when engine is off, with ignition in ‘on’ position.

 

[HiHoeSilver]

Usually the sending unit, sometimes the stepper motor on the gauge. Change the sender first with only AC Delco part and see if it fixes it. Cheap and easy.

 

[swathdiver]

Do you have a Check Engine Light on?

 

[daddyrim]

Yes check engine light is on, but my code reader failed on me so I can’t check the code. Will be looking at getting one tonight. The more I read intend to agree that it’s probably a sending unit. Will be trying to replace it at the next possible opportunity.

Hopefully that’s all it is as I still have to get to work with it!

 

[Dillon2222]

I would def replace the oil pressure sending unit. mine did that but it was pegged all the way or at 0. They are a pain in the ass to change but that fixed my problem. if you change it yourself, have patience when doing it as it is in a tight spot.