I own a 1999 Freightliner FLD 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 and coolant sensor . Had the light bar tested and checked the fan solenoid and they both came back good 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 two months ago. The shutdown lights wouldn't come on unless I put the truck in reverse(I know I know) and as soon as I take it out of reverse it would work just fine. Now they 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 prob. Thanks