what is this light on my dash?
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Ha. Mine just came on today for the first time since I got the car. My co-workers said not to worry about it though because the cold weather makes it fluctuate. I'm gonna check the pressure today anyway.
You are technically correct, but I wouldn't recommend the trouble of draining.
From Wikipedia:
"A fluid is a substance that continually deforms (flows) under an applied shear stress. All gases are fluids, but not all liquids are fluids."

From Wikipedia:
"A fluid is a substance that continually deforms (flows) under an applied shear stress. All gases are fluids, but not all liquids are fluids."
Since the majority of the "tire fluid" is nitrogen and oxygen - typically drain and refill is not necessary... however, most sources of tire fluid have trace amounts of hydrogen which taints the tire fluid... in the winter months with cold ambient air temps condenses the o2 molecules, the concentration of "wet" from the hydrogen becomes increasingly damaging.
I'd say toss the tires and buy new ones when the light comes on
If it wasn't for the fact that there are many threads about it already - and its identified in the owners manual, I'd be more accommodating...
but in this case, I think the tire fluid is way too low and condensation reached a point to throw the volatile"!" which we all know really means the tires are gonna blow up!








, fill it up and drive a bit about 35mph and it should go off.