This code means that the fuel mixture is too lean. It is usually caused by a clogged fuel filter. So I would have the fuel filter replaced (which may be located underneath the car). It also might be helpful to add a bottle of Chevron Techron fuel injector and combustion chamber cleaner to the fuel tank just prior to filling it up. This product works better than other brands; and can be bought at Chevron gas stations, Wal Mart, Auto Zone, and Checker, Shucks, Kragen, Murray, and O'Reilly auto parts stores. The effects of this product become most apparent after driving 50-75 miles from where it was added.
Also; if your spark plugs have not been replaced in the last 30,000 miles, I would have them changed.