Oil pressure on Volvo D12 Engine

So here is my issue, HIGH oil pressure, mechanical gauge has confirmed this, replaced the oil pressure reduction value, check the oil cooler and it has no issues, oil pan is clean, checked the turbo no issues there.
Has anyone else every had something like this? Its a 1998 Series 1 Volvo 770
Thanks

 

OP, what oil are you using?
I hope there isn't any of that Lucas crap in it....
If you're 15W-40 change it to 10W-30 or 5W-30 it'll drop pressure a little but increase the flow.

 

Will oil pressure scencer keep it from starting upr hard to start

 

So what did you figure out, what was the solution.

 

So what was the solutions or fix to this.

The oil pressure sensor shares a ground with the EGR, is there a way to bypass that if you're running a delete?

 

I am working on our spot truck it's a 2001 volvo with D12 engine it only runs for a few minutes then engine fluid light comes on and shuts truck off oil is full coolant is full coolant sensor checks out good replaced oil sensor truck ran for about 30 minutes then shut off and went back to only running for a couple minutes before shutting off replaced oil sensor with a second new sensor still the same thing any ideas I have checked all wires and connectors