What does a yellow exclamation point inside an upside horseshoe on a gauge mean? on 2009 Nissan Altima

This happened after it got icy outside.

Asked by for the 2009 Nissan Altima
Let me guess, no owners manual~!! Which way is upside down for a horseshoe? If it's like an excl. mark inside a big U, with little marks at the botom it is the low tire pressure warning light, have tire pressures checked inclu. the 'spare' tire!!
3 more answers , 4 more comments
Thats the TPMS (tire pressure monitoring system) icon. Check your tire pressures and make sure they are set to the specification on the door.
Well i agree!!
LOL, ditto
That is your TPMS light or tire pressure light.
So do I.