Tire sensor going on at night?
 

I've had my rx8 for 3 days now and when i leave the parking lot of my job the tire sensor light comes on and ive checked all the pressure and visually checked them and they all seem just fine. I drive it for 10min home and it turns off by its self. It's done this the past 2 mornings when i drive home from work. What could the problem be? maybe just a bad sensor?

Mine did that for a bit. Mostly because it was cold in the morning and at night. Shut off after the car warmed up. Check the tire pressure just in case.

Driving the car heats up the tires, and makes the pressure go up. Are you sure the tires are properly inflated? Remember, you have to check the tire pressure cold.
Also, set the pressure to the one indicated in the door label, I think it's 32 pounds all around, but check to make sure.

I got all pressure at 32 and they havent lost air or anything. I was thinking it might have something to do with the cold making the sensor go off but it just seems funny. Thanks

Yeah... one of the pressures is falling because of the cold. Make sure to check the pressures with everything cold. If its fine when cold, I would just ignore the light. Could be a bad sensor, but you won't know which one. . .

Check the tire pressure first thing in the morning before you drive the car.
More than likely just a little low on air pressure.