1. Check your tire pressure if it is too high it will flash if it is too low it will stay solid.
2. One wheel may be missing a sensor or is damaged the only fix is to replace it/all which could be costly given the pairing etc
3. If your Check Engine light is on stop by an auto store and have them read the code and post it up so we can better help you with any issue(s) you might be having.
Generally the H5 Subarus are problem free drivetrain wise but may develop the same squeaks and clunks in the body like all the rest