Was able to quickly diagnose and fix my two cars. Glad to get rid of the annoying TPMS ads. One was a Jeep Grand Cherokee and the other a Nissan Sentra. Both had a defective sensor. I swapped the sensors and cloned them with an OBD cable. Just follow the on-screen instructions. The cost for the tool and 8 gauges was probably a bit more than what the tire shop would have charged to fix both cars, but now I have the tool and 6 gauges left if it happens again.