Q: turn off low tire pressure warning light on 2009 Toyota Corolla

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i changed my wheels and since then my low tire pressure light has refused to go off. i have put the correct pressure
(4) Answers
Not sure about your particular vehicle but some of them have sensors built into the wheel that read the pressure. Some even have one in the spare. I'm assuming it works via radio frequency or something like that since they can put one in the spare.

I'm also assuming this won't be covered under warranty because you changed the wheels but maybe the dealership will go ahead and deactivate or turn it off. Maybe not because if they do, and you have a wreck you could sue them?
You don't say what kind of car you have. Look at the original factory wheels where the valve stem comes out. Is there a module there attached to the valve stem? If so, (which is likely) you need to put those modules into your new wheels and have them rebalanced. Those modules transmit via RF (Radio Frequency) to the computer in your vehicle which in turn controls the light on the dash board. If you have a full size spare as original equipment on the car equipped with the sensor system, then you need to make sure the module is placed in the new wheel in the trunk. Remember, these sensors were required by Federal Law on 2007 and newer cars as factory standard equipment. Most cars such as my Toyota do a computer check each time the car is started. If the computer doesn't see a signal from any tire, the light comes on and nothing short of putting the sensors back in the new wheels will shut it off.