Help - Cannot Program 2006 Rx400H Key Fob

[Mrs.Shaffer]

Help! I have a 2006 Lexus RX400h that I purchased with only one key (the master with the 3 buttons). I can open the doors manually and start/drive the vehicle but the buttons aren't working. The buttons did not work when I got it but the red light on the fob lights up and it is putting out a frequency, however, the buttons will not unlock/lock the door or open the rear hatch. I have tried to self program it but it did not work. It does not enter the programming mode as it should. I do not want to take it to the dealership and to waste money if nothing can be done. Any suggestions?

[pj8708]

Hi Ashley and welcome.

That is an odd type of problem. I think the first thing I would suggest trying is checking all the fuses in the car to see if one has burned out or come loose.

The location of the fuse holders should be in your Owners Manual. There should be one just under the dash on the drivers side foot wall. Another location is under the hood on top of the drivers side fender. The manual should show each fuse and the function it is for. Say 15 amp fuse - door locks.

If that doesn't help you will need to call your dealer and simply ask them for advice and do you need to have the dealer reprogram your key.

Let us know how things are going.

Paul