The TS508WF displays on-tool MX-Sensor relearn procedures including OBDII and can do key fob signal tests. MaxiTPMS TS508WF. OBD Relearn: OBD relearn allows the TS508WF TPMS relearn tool to directly write the TPMS sensor IDs to the TPMS module via the OBD connector to make the on-board TPMS modules recognize the new sensors.