2003 Fliner FLD120 Fan runs constantly, temp light and oil light on

I own a 2003 freightliner FLD120 with a Detroit 60 series 12.7 engine. The red shutdown light for the oil and water temp stay on but the truck doesn't die. The water temp gauge is pretty much stuck at its highest as well when this happens. Sometimes as I'm driving down the road it'll all work fine and then suddenly after awhile just come back on again. I've replaced the oil pressure , coolant sensor , New EDM box and new fan solenoid but nothing works . I'm pretty much having the same problem as this post Oil Pressure light and High Coolant Temperature Light on with no codes.


I first started having this problem around 5 months ago. The shutdown lights stay on all the time. I recently had a shop check it out and they can't figure it out as well. I'm just trying to see if anyone else has had the same problem , please help me