What is TPMS?
A tire pressure monitoring system (TPMS) uses sensors in your tires to tell if one or more of your tires are under-inflated. A low tire pressure light or TPMS light on your dash indicates that your air pressure is more than 25% below the manufacturer’s recommended inflation. Continuing to drive with tire pressure that low is very dangerous - it can result in erratic handling, reduced braking capability, and even a vehicle rollover during sudden changes in direction. To learn what every driver should know about TPMS and driving safety, check out our illustrated guide to TPMS.
The toyota system has a tpms ecu that holds only 5 sensors codes. The codes on the sensors that came with your truck are now programmed in the spaces. You may have 1 extra spot because Toyota used to put a sensor in the spare. Some trucks have 5 others 4 sensors from the factory, but only 5 spots to load codes. So I bought 4 used original TPMS sensors on ebay and installed them on my winter wheels to get ready. Where to program and how much $$? Discussion in 'Gen 3 Prius Care. Keep in mind the -car- is what you are programming. It can only hold four sensors in memory. So you will have to reprogram it twice a year when you swap wheels.