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The TPMS Sensor Check Box allows operators to check whether a TPMS sensor is operational before it is mounted to the wheel. The tester can identify if the pressure sensor port is plugged by tire repair sealants and giving an incorrect pressure. It can alert the operator if the wrong pressure range is applied to the sensor, thus providing a difference between the operator’s gage and TPMS reading. The tester also can identify if the pressure sensor chamber is leaking because of a manufacturing defect.