The pressure sensor answer is a good reason. I have two cars with pressure sensors, and they've gone off a handful of times over the years. Each time I check, t

The pressure sensor answer is a good reason. I have two cars with pressure sensors, and they've gone off a handful of times over the years. Each time I check, the pressure is low and I put more air in. If they're going off constantly, they're faulty, and should be replaced. That's not a design decision failure; sometimes parts are bad.