What does Service Tire Monitor System mean? Tire Pressure Monitoring Systems (TPMS) have been required in all passenger vehicles sold in the U.S. since the 2008 model year. This system uses sensors built into your wheels’ air valves to detect tire pressure. The “Service Tire Monitor System” comes on when the TPMS can’t detect one of these sensors. This could be due to a faulty sensor or a bad battery in the sensor. If you got new tires, the sensors may not have been programmed correctly to talk to your car’s TPMS.
