If you're asking about tire pressure, then the answer is no, 38 PSI is not too high. In fact, it's actually a pretty good tire pressure to have. Most tires will recommend having 32-34 PSI in them, so 38 PSI is just a few psi above that. Having slightly higher tire pressure is actually better for your tires and will help prevent flats and other issues. So if you're happy with the way your tires are performing at 38 PSI, then there's no need to change anything.