Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello, my name is***** of the time when this occurs it is because the transmitter has lost its ability to communicate. In some cases this can also be caused by a bad connection at the vehicle battery. To verify if it is the key fob try using a spare one if you have it. If it is better with that then the transmitter is failing. If not then the battery connections need to be checked as well as the battery load tested. In some cases the receiver module needs to be reprogrammed when this occurs, but that is not that common. I hope this helps. Please let me know if you need further assistance.