this is right out of the ford service manual let me know if these things dont work i will post the next step
NOTE:
It is necessary to address all Continuous Memory Ignition and Misfire DTCs, if received during Continuous Memory testing, before addressing any Fuel Trim DTCs.
Fuel System DTC Reference List:
-- Bank 1 = DTCs P0171 (lean) and P0172 (rich)
-- Bank 2 = DTCs P0174 (lean) and P0175 (rich)
l Check intake air system for leaks, obstructions and damage.
l Check air cleaner element, air cleaner housing for blockage.
l Verify integrity of the PCV system.
l Check for vacuum leaks.
l Are any of the above concerns present?
Yes
REPAIR as necessary. COMPLETE KAM Reset.
No
GO to «DC25».