Remove the relay covers, clean the contacts with a 1/8 fine strip of 600 wet/dry sand paper.
Sonata 08 remote door locks relay.
One of the first symptoms of a possible problem with the door lock relay are door locks that function intermittently.
The dealer will/should know what you need.
The 2011 hyundai sonata has 3 problems reported for power door locks not working properly.
When you press the lock or unlock button (located on your key, or inside your vehicle), the power door lock sends a relay signal to the power door lock actuator.
The door locks on my 2002 hyundai sonata don't respond to the door switch or the remote when trying to lock the doors.
The electronic time and alarm control module also has an input from the ignition key switch.
As far as key sense, it is not necessary.
You will need to buy a new relay switch for the door locks.
Parts like relay & module are shipped directly from authorized hyundai dealers and backed by the manufacturer's warranty.
The door locks may function correctly one moment, and in the next will.
Disassemble the paneling on left side ,under the steering wheel.
This means there is a relay which locks the doors, and there is a separate relay which unlocks the doors.
The actuator, through a series of gears, locks or unlocks the door or doors that you are controlling.
Digital clock, audio, a/t shift lock control module, power outside mirror and mirror folding:
Omega r&d® dual relay door lock interface.
The door switch will not lock or unlock the doors.
Someone suggested replacing the door lock relay.
The two remotes do not unlock or lock the doors or trunk.