My tire pressure (TPMS) warning light has been on for almost a year. I've brought my car to the subaru dealership twice to no avail. They replaced all of the sensors on my tires (free of charge because it didn't fix the issue). They said next step would be to keep my car there for a couple days to look into the issue. Before I do that, does anyone have any ideas what the issue could be and how to fix it? Thank you.