Quote Originally Posted by ray1970 View Post
Never mind. I understand now.

The DRL's are just a safety thing.

The TPMS has more to do with vehicle emissions.

My bad.
Tire Pressure Monitoring Systems (TPMS) have nothing to do with emissions. It is a safety thing mandated after Ford underinflated Firestone tires that kept blowing. I have it on my Z and swap tires for the weather. The wheels for the snow tires don't have the TPMS and the light is on constantly. I do like it on the summer rims since those tires have short sidewalls and don't budge when low or flat.