[shorod]

What model year is the Mountaineer?

The MAF could contribute to the downstream codes, and it is not all that uncommon for the sensor elements to become contaminated. Especially if using a K&N/oiled filter or, in this case, air that is not passing through a filter.

If you have a steady hand, you can clean the elements. Pick up a can of electrical parts cleaner (you can get this at many auto parts stores), remove the MAF sensor (which may be held in with security Torx screws) and generously spray the two sensor elements.

Based on what you mention about a rough idle when cold, you should also consider an out-of-spec coolant temperature sensor (not sender which controls the guage) or an issue with Exhaust Gas Recirculation (EGR) system (contaminated valve or faulty DPFE sensor -- another common problem).

-Rod