How many miles are on your car? You can try this. Unplug and remove the MAF sensor, clean the terminals on the plug and in the sensor. You can purchase a product called MAF Sensor Cleaner. and use that to clean the little wire on the side of the sensor that sits in the intake. Sometimes soot will build up causing it to not work properly.
These are just some things you can try before spending the money to replace the actual sensor. Like greenman said the code refers to the circuit being at fault. Might as well check the integrity of the wires going to the sensor to. Just visually inspect them for any damage, Go from the sensor and try to trace it all the way down. Sure it's all inside the plastic loom, and I'd say it's pretty safe the assume the wire isn't damage inside that plastic.
If you're questioning where the sensor is just look at the Air filter box, and follow the intake tubing, the first sensor after the intake box is the MAF