Lens error on my camera
In most cases this isn't a mechanical problem, it's the component board
that runs the auto-focus. This is a common issue, the only way to completely resolve it however is to have it repaired by the manufacturer.
As this was a common issue, many users have stated their camera was replaced even after the 1 year warranty had expired...you may want to check with the manufacturer to see if this is the case with yours as well.