It sounds like you might be dealing with an electrical issue, possibly a faulty ground connection or a loose wire. Since the TPMS and security lights are both controlled by the vehicle’s ECU, a shared circuit or ground fault could trigger both lights intermittently. Start by checking the battery connections and ground wires for corrosion or looseness, as poor connectivity can cause unpredictable electrical behavior. If everything looks good, a scan with an OBD-II reader might reveal stored error codes that could point to the issue. If no codes appear, consider having a mechanic inspect the wiring for shorts or damaged insulation.