You might have a safety system that shuts the system for the engine off if the oil pressure is low. So, you might have a clog in your oil circuit or an a problem that is intermitant with the oil pump. Sometimes if the truck is running roung the pressure will drop low enough to have the pressure light come on as the pressure threshold is set to go off with just a small drop.
You might also have a failing oil pressure switch.
Thursday, July 5th, 2012 AT 3:43 PM