Why is the TPMS warning appearing now?

I run steelies with no sensors all winter. Light comes on if I drive for longer than 30 minutes straight. Then it goes off again for another few weeks until I drive that long again.

 

I have this one:

$219 Autel MaxiTPMS TS501 PRO, 2025 TPMS Programming Tool Same as TS508, Up of TS501 TS408S, Relearn Activate 99% TPMS Sensors, Program Autel MX-Sensor 315/433MHz, TPMS Reset & Diagnostics, Lifetime Update

https://www.amazon.com/dp/B00BHCFNTS/ref=cm_sw_r_cp_apap_qqxlRiVNzM1SS
It can read the sensors and has an OBD II cord to reprogram the vehicle to new sensors, can also read and clear errors.

 

I have run these wheels on an 05 Tundra and switched them to my Tacoma when I bought it. No sensors, the light is on all the time and I ignore it.

 

Did you check the tire pressure on your spare because all tires on your dash reading looks good. I just had the same happen to a friend and he called the dealership and they said the spare has a TPMS as well. Learn something new every day.$.02

 

They thought maybe they had the wrong MHz sensors because they weren’t working. Now they’re saying their scan tool won’t recognize the truck because it’s a 2021 and they can’t program them. So they’re removing the sensors from my steel wheels and putting them in the new wheels. I vaguely remember reading a thread about the angle of the sensors being possibly different for steel vs aftermarket. They used Shrader sensors with the rubber stem. If I could do it again I’d probably buy my own OEM and have a shop install them. I’ve wasted too much time on this I just want my dash light off

 

This thread may be helpful. Yes, the sensor angles are different between steelies & cast.
https://www.tacomaworld.com/threads...oyota-sr5-wheel-is-supposed-to-accept.378678/