First thank all of you for all the responses.

I have a mechanics tried reading the code again and we got 'P1381'. Referring to a service bulletin (Article No. 00-3-7), he suggested I go to a Ford dealer and he said they should correct it for free, which I doubt.

By the way, I have the 'Extra' ESP (next only to 'Premium'). I am so disappointed to find that all three of the parts that were assumed to be malfunction (VCT Solenoid, VCT Sprocket, Sprocket Bolt) were not listed under the ESP. So here goes the old question:

Will Ford correct this for free? Any input is gratefully appreciated.