Originally Posted by Xewkija631
What do you mean by this? I have never touched my spare...
From 2005 thru 2008 or 2009, the Tacoma had a sensor in the spare and a lot of people would have their tire pressure light come on, check the 4 drive tires and forget to check the spare. It's a good idea to check the pressure in your spare periodically anyways, but that's not causing your light to come on.
As the weather turns colder, the air inside your tires shrinks and can sometimes trip the pressure sensors to read low. Check the pressure in all 4 tires, adjust if necessary, then reset the sensors. There is a reset button below the steering wheel, press and hold it for 5 seconds, until it flashes and it will reset.