maf sensors are a common problem. Try erasing the code and wiggling the wires on the maf sensor while its running. There were a large amount of harnesses that had bad wire ends. Might just need a 5 wire repair (5 new wires installed for maf sensor, they are special wires "gold plated" but the parts department will be able to help you get the right wires if needed.) Also check the connector, a broken connector that is not seated fully on the sensor will cause that code.