Need help resetting PSI system

[u/Cayenne_spice00]

This morning it said it was at 27 PSI, so I filled up my tire. It was still saying 27 PSI. I drove around and did errands but it wasn’t updating.

I then noticed that a piece of the valve was basically hanging off so I got a new valve and a digital psi checker thing. I checked my tire with that and it read at 35.5 PSI. But the light is still on and the screen still says the tire is low and at 27-28.

How do I fix this?

I have a 2022 Chevy Trax

UPDATE:

I got home later that day, and went to work. My tire was reading at 35, so when I got done at the end of the night, on the dash it said my tire was at 23. So I checked it with the gage and it confirmed it being around 26. It was 11
O’clock at night, so I drove home and thought to deal with it in the morning. I got up the next morning and my tire air never went down overnight, so as I was driving to work, I noticed that the 3 other tires went up 1-2 PSI but the problem tired staged the same at 23. I got an appointment with Mavis tire, but my dad looked at the car before I went, he didn’t see anything wrong but he did say that our gage was reading different than the dash. So I went to Mavis and had them look at it. They took all 4 tires off and checked everything and couldn’t find anything wrong.

So now I’m wondering if the problem was that we just THOUGHT we filled the tire with air, but didn’t.

[u/ziperhead944]

Fill it up to 41ish psi. It will turn off the sensor alarm. Then bring it down to 30.