Tpms sensor help

Hey guys I have a 2021 Chevy equinox LT AWD and I replaced a sensor on one of my front tires and I tried to do the learning process and it’s reading as -. I used my tpms tool and it detects it so it’s not bad I think. Is there anything I’m missing? I put relearn tpms sensor in the dash and I let out a little air and it never honks.