What does check system mean on a Lexus is250?

The check system light on a Lexus IS250 usually means that there is a problem with Your tire pressure monitoring system. The tire pressure sensors have batteries in them, when the batteries die that can cut the communication between them and Your car and that will make the check system light turn on. Usually You should check and replace the batteries in Your tire pressure sensors each time that You change Your tires to prevent this from happening. It can be a somewhat difficult problem to fixAs You will need to remove the tire from the wheel to replace the sensor or the battery in it. The tire pressure system is important though as it can help You remember to keep Your tires filled to give even wear.