I hadn't heard anything about a low pressure switch. That would make a lot of sense, but at the same time, if they were to go through all the effort of building an algorithm based system and then run a mechanical switch, why not just run a mechanical pressure sender? But anyways, if there is a low pressure switch that lights the dash up it only seems to work after the damage as been done.While I do not have personal knowledge about how the system works others on hear that claim to have reported the indicated pressure is an algorithm based upon rpm and oil temperature and that there is a low pressure switch that triggers the alarm. Given that the warning of low oil pressure is supposed to give you time to shut things down before you destroy the engines it seems unlikely to me that anybody would design and build a system that doesn't give an oil pressure warning immediately when the pressure falls below the switch trigger point .
Wasn't intended to be brought out as fact. It was a "for all we know" type of comment. I was under the assumption that there was no other oil pressure sensing system in place besides the algorithm. If the algorithm was the only thing than something else needs to sense something is going on, such as a knock sensor. But that's probably not the case either as there's reports that when the engine fails, the dash lights up like a christmas tree and messages like service electronic throttle pop up. It warns against everything. This makes me think the ECM has no idea what just happened, but knows somethings not right.What do you base this knowledge on? The fact that the ECM throws a low oil pressure warning based on a knock.