I was driving this morning and my TPMS warning light came on and highlighted my front 2 wheels. When it first went on I had been driving for a bit and it showed all 4 tires at 40psi and yellow around the front 2. I have been parked for a while and just got back in. The pressure now shows 38 in both fronts but the light is still on and the front 2 wheels are still shown in yellow.
My car suggests 37 psi for all tires, cold. I'm spot on. Strange that it's showing the 2 fronts. I hope it's not a bad pair of sensors, I don't want to go back to the dealer. Anyone else ever seen this happen?

 

Now this

 

If your pressure is correct (you can verify this by measuring it with a gauge), you can reset the the current values as nominal, and the warning disappears.
It should be under Service=>TPMS=>Restart (not sure i have the names correct because mine has a Dutch menu).
It is a bit strange you have this message though. Do you know what the values were before you got the message? Usually the system responds to sudden pressure changes.

 

I didn't measure with my gauge yet. I thought it was strange to get the message on the front 2 at the same time.

 

I was getting same kind of warnings - mainly with seasonal changes in temp. Just refill to 40psi and perform the reset in the menu. Keep in mind the TPMS system won't register the new pressures until you go for a drive.