32 degrees this morning and five minutes into my drive my TPMS light came on and stayed on and the rest of my drive. NOT a low-tire pressure light. I just assumed I have a dead or dying battery in one of the sensors. What else can activate this light? I would like to read the code and recalibrate at home. Can I turn this into another sales pitch to my wife for a Foxwell NT510? I may need more help with the sales pitch than the light, honestly.