MFD capabilities (or lack thereof)?

I am unhappy with the capabilities of my 2006 prius MFD.

A couple of months ago, noticed the red triangle would flash momentarily sometimes while driving. Just flash, nothing on MFD to say why. After a few days of trying to catch what it was trying to tell me, it stayed on longer and gave a short message in the MFD that 'oil level is low'. Wth - why wouldn't it just let me know at first, vice driving another couple of hundred miles before actually telling me??

When I first got the car I couldn't believe the MFD wouldn't tell me the oil pressure or coolant temps. I have a 1998 corvette that allows me to read all four tires pressures, any DTC's that are current, or history, my oil temp, oil press, water temp, tranny fluid temp and lots more. All from a simple one line alphanumeric display.

I just changed my inverter and engine coolants, and sure wish the wimpy MFD could tell me something useful. The vehicle electronics know what DTC's are set, but we have to hook on a scanner to read them? Come on.....The vehicle should know the coolant temps - but won't tell us (unless it might be too late and damage already done?).

Seems there should be some secret sequences to get this info - anybody know?? I tried searching but couldn't find much (there is the sequence to hit start twice, hold info and turn lights on/off 3X - but none of that info has DTC's, oil press, coolant temps.......)