Ford Repair: ford f250, mass air flow sensor, ford f250 super duty

Question
QUESTION: i have a ford f250 super duty with a 5.4l gas engine im getting trouble code p0174 system to lean bank2 i replaced the the fuel filter and its still stalling out

ANSWER: Need to know the year model.

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QUESTION: the year is 2005 4 door long box f250 super duty 5.4 liter

Answer
The Mass Air Flow Sensor is dirty or faulty. Using a K&N air filter can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak downstream of the MAF sensor. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure that it is good and dry before reinstalling. Also, inspect all vacuum and PCV hoses, replace if necessary.