Since light came on engine runs rough at start-up but seems to clear up after engine warms up?

Question

Can erase the engine light but comes back in a couple of days.

Answer 1

P219A Bank 1 Air / fuel ratio imbalance

This code just represent what the engine is going through. When the engine is cold it needs more fuel than air. In the worse case scenario this exhibits a cylinder valve problem when the engine is cold the valve do not seat until the engine is warmed up. This year . make and model the MAP sensor circuit tends to have  a lot of problem , Since the engine runs fine when it warms up do not clear the code. check and see if there  are other code that may be stored with this. P219A is a variety of reason for it to set . Exhaust leaks prior to the front 02 sensor , Fuel contamination (which is more NOT likely the problem for this) . To low fuel pressure  which if it is let the recall from Ford handle it.