How do you reset the TSP light in the Toyota Sienna?

To reset the Tire Pressure Monitoring System (TPMS) light in a Toyota Sienna, first ensure that all tires are properly inflated to the recommended pressure. Then, turn the ignition to the "ON" position without starting the engine. Press and hold the TPMS reset button, usually located beneath the steering wheel, until the TPMS light blinks three times, then release the button. Start the engine and the light should turn off after a few moments; if it doesn't, you may need to check for any tire issues.