This happened after it got icy outside.
Nissan Q&AAsk Your Question
2009 Nissan Altima Question: What does a yellow exclamation point inside an upside horseshoe on a gauge mean?
Answer #1pushrod January 30, 2014, 17:02Master
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!!
Answer #2cardocIII from Gillespie's Auto Service, January 30, 2014, 17:02Master
Thats the TPMS (tire pressure monitoring system) icon. Check your tire pressures and make sure they are set to the specification on the door.
Replypushrod, January 30, 2014, 17:06Master
Well i agree!!
ReplycardocIII, January 30, 2014, 17:23Master
Replypushrod, January 30, 2014, 17:27Master
Answer #3Greg's Orange Auto (13419 Answers) , Orange, CA - (714) 361-9386globalhelper January 31, 2014, 06:30Master
AGREE WITH #2
Replypushrod, January 31, 2014, 14:18Master
So do I.
Answer #4Express Auto Service (1 Answer) , Fredericksburg, VA - (540) 726-5470Express Auto September 10, 2014, 08:18Enthusiast
That is your TPMS light or tire pressure light.