I have a 2008 Toyota RAV4. One day, the TPMS warning light came on. I then checked the pressure in all of my tires, including the spare. All were ~34 psig, which is plenty of pressure.
I went to a tire shop, and they scanned each of my tires for the TPMS sensor. The TPMS sensor in my back left tire was non-responsive.
I didn't have it replaced for a while. I just drove around with my TPMS warning light on, and regularly manually checked my tire pressure.
Then, about a week later, suddenly I noticed my TPMS warning light was no longer on. I checked my tires, all were still inflated.
I am very happy this happened, as I don't have to replace my tires yet. However, I started wondering why the sensor started working again. I can't seem to find this information on the internet anywhere.
I am wondering: does anyone know why a TPMS sensor would start working again?
My best theory is that the battery inside the sensor died, but then somehow rebounded, as I have observed batteries do.