Thank you so much for the info, WWWPerfA_ZNOW, (um, how do you pronounce that? ) I've been getting the low pressure warning every time my 2011 Edge is at idle and it's cold or just chilly outside. It's got to be the same thing! Very annoying. And it's just intermittent enough to not show up while at the service dept., and then I get "the look" from the service advisor like I obviously don't know what I'm talking about. Ah, such is life. But my 100,000 mile service is coming up, so now I have something to politely hand them when they tell me I'm crazy again.
Anyway, thanks again!