To reset the maintenance light on a 2016 Toyota Camry, first, turn the vehicle to the 'On' position, but don't start the engine. Press the 'Trip' button until the odometer displays 'Trip A'. Turn the vehicle off, then press and hold the 'Trip' button. While holding the button, turn the vehicle to 'On'. The maintenance light should blink a few times before going off, indicating it's been reset.