Key fob won’t lock doors

[Derrickp13]

My 2009 Hyundai Genesis key fob won’t lock my doors, i replaced the battery and still nothing, but when i get in the car the key still starts my car and detects when the key is not in the car, i don’t know what to do

 

[mikec]

What happens if you try to lock using the other fob? It may be the fob button is simply worn out... it happens. Or, with the problematic fob, can you open the trunk? If so, the fob is a) transmitting and b) the car is receiving it. That points to a worn-out lock button. Moisture and oils from your hands does work its way into the fob, gumming up the switch contacts just like it does on TV remote controls. It is possible to dig into the fob and clean it out sometimes.

If the fob won't work the door locks nor the trunk, but the other fob works normally, the fob has an internal issue. If neither fob works I would think the car's external receiver unit is likely having issues by not receiving the fob signals. A different receiver is used inside the car for starting... one can be bad while the other works.

mike c.

 

[Derrickp13]

What happens if you try to lock using the other fob? It may be the fob button is simply worn out... it happens. Or, with the problematic fob, can you open the trunk? If so, the fob is a) transmitting and b) the car is receiving it. That points to a worn-out lock button. Moisture and oils from your hands does work its way into the fob, gumming up the switch contacts just like it does on TV remote controls. It is possible to dig into the fob and clean it out sometimes.

If the fob won't work the door locks nor the trunk, but the other fob works normally, the fob has an internal issue. If neither fob works I would think the car's external receiver unit is likely having issues by not receiving the fob signals. A different receiver is used inside the car for starting... one can be bad while the other works.

mike c.

I bought the car used it didn’t come with a second fob i checked the fuse and it’s still good the car starts and everything, the key won’t lock my doors or unlock the trunk, my doors also lock when i take off automatically still