High oil pressure 120

I'd like to know the answer as well, KW though, not Volvo. My gauge was pegged at 100 psi and the qualcomm was showing 148 psi reading from the ECM. Did that for a while now the gauge just stays at zero and the qualcomm zero too. Hopefully just a sensor. Truck runs fine.

 

Sounds like a "HeavyD question...p.m. Him and keep us posted

 

I would think oil pressure relief valve, the gauge and ecm get there readings from different sensors, most of the time the gauge is still a mechanical gauge with line run in cab from eng.

 

Sounds to me like the pressure switch is bad. By pass valves normally dont stick close, they can however rarely, stick open. that would show low oil pressure. And all your guages are most likely electronic. Except your air guages.

 

I say not. A bad sensor, clogged case valve, a Turbo sensor, yea, that can do it too. It's a diesel, most likely it's a sensor. I'm NOT a mechanic.

 

I would about bet the kw with the problem in this post has a manual gauge in dash, oil pressure went from pegged out to 0 something happened. I don't see alot of real late model volvo's like I do the Pete and KW but all I have worked on for oil pressure concerns have used a 3 wire sensor for ECM this is where prodriver and qaulcomm get data. a 1 wire sending unit for electric gauge and 90 percent still use a manual gauge. What are the odds of two different "sensors" giving the same wrong reading I dont know as I'm not a gambler. 120 psi for sure is on the edge of blowing the sealing ring on the oil filter.

 

I do not see any way for your pressure to get that high. it must be the sensor ,or the gauge, or a short somewhere.

 

If its not a sensor, a spun main bearing can cause a spike in oil pressure because of blockage. Hope that's not the case. Good luck kiddo.

 

my Columbia didn't come with a manual style gauge, only an electric one. now Ofcourse I put in the much more accurate manual gauge before heading out on its first load. good thing to considering that sensor went bad a few years later, had top drive a hundred miles holding down the shut down over ride switch. anyway on my Detroit the same sensor feeds the ecm and the gauge. I bet it's a sensor problem on yours also, or you'd be able to find oil coming from somewhere. I'm also surprised out hadn't flashed a code or cel.