I have an 05 LX sedan and a few weeks ago, I noticed that the drivers door wouldn't always unlock after pressing the unlock button on the key. A few days later, the other three door locks began doing the same and a few days after that, the drivers door wouldn't always lock when the button is pressed. Now, the door locks seem to work sporadically. They don't always lock and they don't always unlock, however it is mostly the driver's door that does it now. I suspect it to be the drivers lock actuator, relay, or possibly the central locking system. Any suggestions or ideas?