This just happened to me. The light came on last night. I pulled over and jumped out in the biting cold to make sure none of them were going flat. They were not. I drove home. This morning, on my way to work, I drove to the neighborhood service station and checked my fronts, which looked slightly lower than the rears. They were both at 30. I checked my door and it says 32. So I put air in them and checked it. It took a few tries as I either put too much or not enough in. LOL I am not a fan of checking tire pressure as it seems way to easy to over fill and then, you need to let some out and you check again and it is low. I ended up leaving them around 34 as I could not get it at 32. I did not have time to pull of the spare cover this morning and driving to work, the light did not go off. So tonight I will check the back tires too and read how to pull the spare cover and check it.
Why would the spare lose air so fast? I've had the Rav for 2 months. I do not claim to be highly knowledgeble but I'm not an idiot either. I was married for 13 years to a good man who loves to rebuild old cars (32-40 vintage) and learned a lot when I'd help him bleed brakes, pull parts, etc. It would make sense that the tires running on the road will be effected by weather, traction, miles, etc. But I guess I am surprised that the spare would be low, if that is it, so quickly. Do tires lose air that quickly, that are not running on the road?
Also, since I was cursing the little tire pressure valve this morning with my fingers not so nimble in the cold, anyone recommend a good brand/model that is accurate and easy to use? I find that to my untrained hands, the basic ones, with the little white stick that pops out, to be hard to use without letting too much air out. Maybe I'm doing it wrong. I don't want to call the dear exH as I don't like to bug him, though he is always willing to answer my questions. He didn't want to get out of my Rav when I drove to his house on Christmas ;-) He has a Tundra and loves it.
thanks for your thoughts. If the light doesn't go off after I check the rear and spare tonight, I'll call my dealer.