Tire pressure dashboard light is on, however the 4 tires are inflated property, Why?

Theres a sensor that monitors the air PSI maybe is faulty

I am having the same issues. Could you please let me know if you find the answers to these problems. I was told to clean the vents under the hood the keep the water from getting in the door panel. Not sure it will work because I just got them cleaned. As for the tire pressure light, I just had it reset. I used the ignition in run and pulling the lights from off to park 3 times.

tire pressure light is on dash board